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ReportApril 2010

CONTENTSPREFACEi

EXECUTIVE SUMMARYiii

INTRODUCTION

1THE CHANGED – AND CHANGING –NUCLEAR SECURITY ENVIRONMENT

3

PREVENTING NUCLEAR PROLIFERATION
AND NUCLEAR TERRORISM

9REDUCING THE ROLE OF U.S. NUCLEAR WEAPONS15MAINTAINING STRATEGIC DETERRENCE AND
STABILITY AT REDUCED NUCLEAR FORCE LEVELS

19

STRENGTHENING REGIONAL DETERRENCE
AND REASSURING U.S. ALLIES AND PARTNERS31

SUSTAINING A SAFE, SECURE,
AND EFFECTIVE NUCLEAR ARSENAL37

LOOKING AHEAD:TOWARD A WORLD WITHOUT NUCLEAR WEAPONS

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EXECUTIVE SUMMARY
In his April 2009 speech in Prague, President Obama highlighted 21st century nuclear dangers,
declaring that to overcome these grave and growing threats, the United States will “seek the peaceand security of a world without nuclear weapons.” He recognized that such an ambitious goal
could not be reached quickly –perhaps, he said, not in his lifetime.
But the President expressed his
determination to take concrete steps
toward that goal, including by
reducing the number of nuclear
weapons and their role in U.S.
national security strategy. At thesame time, he pledged that as longas nuclear weapons exist, the UnitedStates will maintain a safe, secure,and effective arsenal, both to deter
potential adversaries and to assure President Barack Obama unveils his vision for reducing nuclear
U.S. allies and other security partners dangers and pursuing the long-term goal of a world without nuclear
weapons in Prague’s Hradcany Square on Apr. 5, 2009. Official
that they can count on America’s White House photo by Lawrence Jackson.
security commitments.
The 2010 Nuclear Posture Review (NPR) outlines the Administration’s approach to promoting
the President’s agenda for reducing nuclear dangers and pursuing the goal of a world without
nuclear weapons, while simultaneously advancing broader U.S. security interests. The NPR
reflects the President’s national security priorities and the supporting defense strategy objectives
identified in the 2010 Quadrennial Defense Review.
After describing fundamental changes in the international security environment, the NPR reportfocuses on five key objectives of our nuclear weapons policies and posture:
1. Preventing nuclear proliferation and nuclear terrorism;
2. Reducing the role of U.S. nuclear weapons in U.S. national security strategy;
3. Maintaining strategic deterrence and stability at reduced nuclear force levels;
4. Strengthening regional deterrence and reassuring U.S. allies and partners; and5. Sustaining a safe, secure, and effective nuclear arsenal.

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While the NPR focused principally on steps to be taken in the next five to ten years, it also
considered the path ahead for U.S. nuclear strategy and posture over the longer term. Making
sustained progress to reduce nuclear dangers, while ensuring security for ourselves and our allies
and partners, will require a concerted effort by a long succession of U.S. Administrations andCongresses. Forging a sustainable consensus on the way ahead is critical.
The Changed – and Changing – International Security Environment
The international security environment has changed dramatically since the end of the Cold War.
The threat of global nuclear war has become remote, but the risk of nuclear attack has increased.
As President Obama has made clear, today’s most immediate and extreme danger is nuclear
terrorism. Al Qaeda and their extremist allies are seeking nuclear weapons. We must assume theywould use such weapons if they managed to obtain them. The vulnerability to theft or seizure ofvast stocks of such nuclear materials around the world, and the availability of sensitive equipment
and technologies in the nuclear black market, create a serious risk that terrorists may acquire
what they need to build a nuclear weapon.
Today’s other pressing threat is nuclear proliferation. Additional countries – especially those atodds with the United States, its allies and partners, and the broader international community –may acquire nuclear weapons. In pursuit of their nuclear ambitions, North Korea and Iran haveviolated non-proliferation obligations, defied directives of the United Nations Security Council,
pursued missile delivery capabilities, and resisted international efforts to resolve throughdiplomatic means the crises they have created. Their provocative behavior has increased
instability in their regions and could generate pressures in neighboring countries for considering
nuclear deterrent options of their own. Continued non-compliance with non-proliferation norms
by these and other countries would seriously weaken the Nuclear Non-Proliferation Treaty(NPT), with adverse security implications for the United States and the international
community.
While facing the increasingly urgent threats of nuclear terrorism and nuclear proliferation, theUnited States must continue to address the more familiar challenge of ensuring strategic stability
with existing nuclear powers – most notably Russia and China. Russia remains America’s only
peer in the area of nuclear weapons capabilities. But the nature of the U.S.-Russia relationshiphas changed fundamentally since the days of the Cold War. While policy differences continue toarise between the two countries and Russia continues to modernize its still-formidable nuclear
forces, Russia and the United States are no longer adversaries, and prospects for militaryconfrontation have declined dramatically. The two have increased their cooperation in areas ofshared interest, including preventing nuclear terrorism and nuclear proliferation.

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The United States and China are increasingly interdependent and their shared responsibilities foraddressing global security threats, such as weapons of mass destruction (WMD) proliferation andterrorism, are growing. At the same time, the United States and China’s Asian neighbors remain
concerned about China’s current military modernization efforts, including its qualitative andquantitative modernization of its nuclear arsenal. China’s nuclear arsenal remains much smaller
than the arsenals of Russia and the United States. But the lack of transparency surrounding its
nuclear programs – their pace and scope, as well as the strategy and doctrine that guides them –raises questions about China’s future strategic intentions.
These changes in the nuclear threat environment have altered the hierarchy of our nuclear
concerns and strategic objectives. In coming years, we must give top priority to discouraging
additional countries from acquiring nuclear weapons capabilities and stopping terrorist groups
from acquiring nuclear bombs or the materials to build them. At the same time, we must
continue to maintain stable strategic relationships with Russia and China and counter threats
posed by any emerging nuclear-armed states, thereby protecting the United States and our allies
and partners against nuclear threats or intimidation, and reducing any incentives they might haveto seek their own nuclear deterrents.
Implications for U.S. Nuclear Weapons Policies and Force Posture
The massive nuclear arsenal we inherited from the Cold War era of bipolar militaryconfrontation is poorly suited to address the challenges posed by suicidal terrorists and unfriendly
regimes seeking nuclear weapons. Therefore, it is essential that we better align our nuclear
policies and posture to our most urgent priorities – preventing nuclear terrorism and nuclear
proliferation.
This does not mean that our nuclear deterrent has become irrelevant. Indeed, as long as nuclear
weapons exist, the United States will sustain safe, secure, and effective nuclear forces. These
nuclear forces will continue to play an essential role in deterring potential adversaries andreassuring allies and partners around the world.
But fundamental changes in the international security environment in recent years – including
the growth of unrivaled U.S. conventional military capabilities, major improvements in missile
defenses, and the easing of Cold War rivalries – enable us to fulfill those objectives atsignificantly lower nuclear force levels and with reduced reliance on nuclear weapons. Therefore,
without jeopardizing our traditional deterrence and reassurance goals, we are now able to shape
our nuclear weapons policies and force structure in ways that will better enable us to meet ourmost pressing security challenges.


By reducing the role and numbers of U.S. nuclear weapons – meeting our NPT Article VI
obligation to make progress toward nuclear disarmament – we can put ourselves in av
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much stronger position to persuade our NPT partners to join with us in adopting themeasures needed to reinvigorate the non-proliferation regime and secure nuclear materials
worldwide.
By maintaining a credible nuclear deterrent and reinforcing regional security architectureswith missile defenses and other conventional military capabilities, we can reassure our
non-nuclear allies and partners worldwide of our security commitments to them andconfirm that they do not need nuclear weapons capabilities of their own.



By pursuing a sound Stockpile Management Program for extending the life of U.S.
nuclear weapons, we can ensure a safe, secure, and effective deterrent without thedevelopment of new nuclear warheads or further nuclear testing.



By modernizing our aging nuclear facilities and investing in human capital, we cansubstantially reduce the number of nuclear weapons we retain as a hedge against technicalor geopolitical surprise, accelerate dismantlement of retired warheads, and improve ourunderstanding of foreign nuclear weapons activities.



By promoting strategic stability with Russia and China and improving transparency andmutual confidence, we can help create the conditions for moving toward a world without
nuclear weapons and build a stronger basis for addressing nuclear proliferation andnuclear terrorism.



By working to reduce the salience of nuclear weapons in international affairs and moving
step-by-step toward eliminating them, we can reverse the growing expectation that we aredestined to live in a world with more nuclear-armed states, and decrease incentives for
additional countries to hedge against an uncertain future by pursuing nuclear options of
their own.

Preventing Nuclear Proliferation and Nuclear Terrorism
As a critical element of our effort to move toward a world free of nuclear weapons, the UnitedStates will lead expanded international efforts to rebuild and strengthen the global nuclear nonproliferation regime – and for the first time, the 2010 NPR places this priority atop the U.S.
nuclear agenda. Concerns have grown in recent years that we are approaching a nuclear tipping
point – that unless today’s dangerous trends are arrested and reversed, before very long we will beliving in a world with a steadily growing number of nuclear-armed states and an increasing
likelihood of terrorists getting their hands on nuclear weapons.
The U.S. approach to preventing nuclear proliferation and nuclear terrorism includes three key
elements. First, we seek to bolster the nuclear non-proliferation regime and its centerpiece, theNPT, by reversing the nuclear ambitions of North Korea and Iran, strengthening Internationalvi
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Atomic Energy Agency safeguards and enforcing compliance with them, impeding illicit nuclear
trade, and promoting the peaceful uses of nuclear energy without increasing proliferation risks.
Second, we are accelerating efforts to implement President Obama’s initiative to secure allvulnerable nuclear materials worldwide in four years.
And third, we are pursuing arms control efforts – including the New Strategic Arms Reduction
Treaty (New START), ratification and entry into force of the Comprehensive Nuclear Test Ban
Treaty, and negotiation of a verifiable Fissile Material Cutoff Treaty – as a means ofstrengthening our ability to mobilize broad international support for the measures needed toreinforce the non-proliferation regime and secure nuclear materials worldwide.
Among key Administration initiatives are:

Pursuing aggressively the President’s Prague initiative to secure all vulnerable nuclear
materials worldwide, including accelerating the Global Threat Reduction Initiative andthe International Nuclear Material Protection and Cooperation Program. This includes
increasing funding in fiscal year (FY) 2011 for Department of Energy nuclear nonproliferation programs to $2.7 billion, more than 25 percent.

Enhancing national and international capabilities to disrupt illicit proliferation networks
and interdict smuggled nuclear materials, and continuing to expand our nuclear forensics
efforts to improve the ability to identify the source of nuclear material used or intended
for use in a terrorist nuclear explosive device.

Initiating a comprehensive national research and development program to support
continued progress toward a world free of nuclear weapons, including expanded work on
verification technologies and the development of transparency measures.



Renewing the U.S. commitment to hold fully accountable any state, terrorist group, orother non-state actor that supports or enables terrorist efforts to obtain or use weapons ofmass destruction, whether by facilitating, financing, or providing expertise or safe havenfor such efforts.

Reducing the Role of U.S. Nuclear Weapons
The role of nuclear weapons in U.S. national security and U.S. military strategy has been reduced
significantly in recent decades, but further steps can and should be taken at this time.
The fundamental role of U.S. nuclear weapons, which will continue as long as nuclear weapons
exist, is to deter nuclear attack on the United States, our allies, and partners.
During the Cold War, the United States reserved the right to use nuclear weapons in response toa massive conventional attack by the Soviet Union and its Warsaw Pact allies. Moreover, after thevii
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United States gave up its own chemical and biological weapons (CBW) pursuant to international
treaties (while some states continue to possess or pursue them), it reserved the right to employ
nuclear weapons to deter CBW attack on the United States and its allies and partners.
Since the end of the Cold War, the strategic situation has changed in fundamental ways. With
the advent of U.S. conventional military preeminence and continued improvements in U.S.
missile defenses and capabilities to counter and mitigate the effects of CBW, the role of U.S.
nuclear weapons in deterring non-nuclear attacks – conventional, biological, or chemical – hasdeclined significantly. The United States will continue to reduce the role of nuclear weapons indeterring non-nuclear attacks.
To that end, the United States is now prepared to strengthen its long-standing “negative security
assurance” by declaring that the United States will not use or threaten to use nuclear weapons
against non-nuclear weapons states that are party to the NPT and in compliance with their
nuclear non-proliferation obligations.
This revised assurance is intended to underscore the security benefits of adhering to and fullycomplying with the NPT and persuade non-nuclear weapon states party to the Treaty to workwith the United States and other interested parties to adopt effective measures to strengthen the
non-proliferation regime.
In making this strengthened assurance, the United States affirms that any state eligible for theassurance that uses chemical or biological weapons against the United States or its allies andpartners would face the prospect of a devastating conventional military response – and that any
individuals responsible for the attack, whether national leaders or military commanders, would
be held fully accountable. Given the catastrophic potential of biological weapons and the rapid
pace of bio-technology development, the United States reserves the right to make any adjustmentin the assurance that may be warranted by the evolution and proliferation of the biologicalweapons threat and U.S. capacities to counter that threat.
In the case of countries not covered by this assurance – states that possess nuclear weapons andstates not in compliance with their nuclear non-proliferation obligations – there remains anarrow range of contingencies in which U.S. nuclear weapons may still play a role in deterring a
conventional or CBW attack against the United States or its allies and partners. The UnitedStates is therefore not prepared at the present time to adopt a universal policy that deterring
nuclear attack is the sole purpose of nuclear weapons, but will work to establish conditions underwhich such a policy could be safely adopted.
Yet that does not mean that our willingness to use nuclear weapons against countries not coveredby the new assurance has in any way increased. Indeed, the United States wishes to stress that it
would only consider the use of nuclear weapons in extreme circumstances to defend the vital

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interests of the United States or its allies and partners. It is in the U.S. interest and that of allother nations that the nearly 65-year record of nuclear non-use be extended forever.
Accordingly, among the key conclusions of the NPR:The United States will continue to strengthen conventional capabilities and reduce therole of nuclear weapons in deterring non-nuclear attacks, with the objective of making
deterrence of nuclear attack on the United States or our allies and partners the sole
purpose of U.S. nuclear weapons.



The United States would only consider the use of nuclear weapons in extreme
circumstances to defend the vital interests of the United States or its allies and partners.



The United States will not use or threaten to use nuclear weapons against non-nuclear
weapons states that are party to the NPT and in compliance with their nuclear nonproliferation obligations.

Maintaining Strategic Deterrence and Stability at Reduced Nuclear Force Levels
Since the end of the Cold War, the United States and Russia have reduced operationallydeployed strategic nuclear weapons by about 75 percent, but both still retain many more nuclear
weapons than they need for deterrence. The Administration is committed to working with Russia
to preserve stability at significantly reduced force levels.
New START. The next step in this process is to replace the now-expired 1991 START I Treaty
with another verifiable agreement, New START. An early task for the NPR was to develop U.S.
positions for the New START negotiations and to consider how U.S. forces could be structured
in light of the reductions required by the new agreement. The NPR reached the following
conclusions:

Stable deterrence can be maintained while reducing U.S. strategic delivery vehicles – intercontinental ballistic missiles (ICBMs), submarine-launched ballistic missiles (SLBMs),
and nuclear-capable heavy bombers – by approximately 50 percent from the START I
level, and reducing accountable strategic warheads by approximately 30 percent from the
Moscow Treaty level.

Building on NPR analysis, the United States agreed with Russia to New START limits of
1,550 accountable strategic warheads, 700 deployed strategic delivery vehicles, and a
combined limit of 800 deployed and non-deployed strategic launchers.



The U.S. nuclear Triad of ICBMs, SLBMs, and nuclear-capable heavy bombers will bemaintained under New START.

All U.S. ICBMs will be “de-MIRVed” to a single warhead each to increase stability.
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Contributions by non-nuclear systems to U.S. regional deterrence and reassurance goals
will be preserved by avoiding limitations on missile defenses and preserving options forusing heavy bombers and long-range missile systems in conventional roles.

Maximizing Presidential decision time. The NPR concluded that the current alert posture of
U.S. strategic forces – with heavy bombers off full-time alert, nearly all ICBMs on alert, and asignificant number of SSBNs at sea at any given time – should be maintained for the present. It
also concluded that efforts should continue to diminish further the possibility of nuclear launches
resulting from accidents, unauthorized actions, or misperceptions and to maximize the time
available to the President to consider whether to authorize the use of nuclear weapons. Key steps
include:Continuing the practice of “open-ocean targeting” of all ICBMs and SLBMs so that, inthe highly unlikely event of an unauthorized or accidental launch, the missile would landin the open ocean, and asking Russia to re-confirm its commitment to this practice.

Further strengthening the U.S. command and control system to maximize Presidential
decision time in a nuclear crisis.



Exploring new modes of ICBM basing that enhance survivability and further reduce any
incentives for prompt launch.

Reinforcing strategic stability. Given that Russia and China are currently modernizing their
nuclear capabilities – and that both are claiming U.S. missile defense and conventionally-armed
missile programs are destabilizing – maintaining strategic stability with the two countries will be
an important challenge in the years ahead.


The United States will pursue high-level, bilateral dialogues on strategic stability withboth Russia and China which are aimed at fostering more stable, resilient, and transparent
strategic relationships.

A strategic dialogue with Russia will allow the United States to explain that our missile defenses
and any future U.S. conventionally-armed long-range ballistic missile systems are designed toaddress newly emerging regional threats, and are not intended to affect the strategic balance with
Russia. For its part, Russia could explain its modernization programs, clarify its current military
doctrine (especially the extent to which it places importance on nuclear weapons), and discuss
steps it could take to allay concerns in the West about its non-strategic nuclear arsenal, such as
further consolidating its non-strategic systems in a small number of secure facilities deep within
Russia.
With China, the purpose of a dialogue on strategic stability is to provide a venue and mechanism
for each side to communicate its views about the other’s strategies, policies, and programs onx
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nuclear weapons and other strategic capabilities. The goal of such a dialogue is to enhance
confidence, improve transparency, and reduce mistrust. As stated in the 2010 Ballistic Missile
Defense Review Report, “maintaining strategic stability in the U.S.-China relationship is as
important to this Administration as maintaining strategic stability with other major powers.”
Future nuclear reductions. The President has directed a review of post-New START arms
control objectives, to consider future reductions in nuclear weapons. Several factors will influence
the magnitude and pace of future reductions in U.S. nuclear forces below New START levels.
First, any future nuclear reductions must continue to strengthen deterrence of potential regional
adversaries, strategic stability vis-à-vis Russia and China, and assurance of our allies and partners.
This will require an updated assessment of deterrence requirements; further improvements in
U.S., allied, and partner non-nuclear capabilities; focused reductions in strategic and nonstrategic weapons; and close consultations with allies and partners. The United States willcontinue to ensure that, in the calculations of any potential opponent, the perceived gains ofattacking the United States or its allies and partners would be far outweighed by the unacceptable
costs of the response.
Second, implementation of the Stockpile Stewardship Program and the nuclear infrastructure
investments recommended in the NPR will allow the United States to shift away from retaining
large numbers of non-deployed warheads as a hedge against technical or geopolitical surprise,allowing major reductions in the nuclear stockpile. These investments are essential to facilitating
reductions while sustaining deterrence under New START and beyond.
Third, Russia’s nuclear force will remain a significant factor in determining how much and how
fast we are prepared to reduce U.S. forces. Because of our improved relations, the need for strict
numerical parity between the two countries is no longer as compelling as it was during the Cold
War. But large disparities in nuclear capabilities could raise concerns on both sides and among
U.S. allies and partners, and may not be conducive to maintaining a stable, long-term strategic
relationship, especially as nuclear forces are significantly reduced. Therefore, we will place
importance on Russia joining us as we move to lower levels.
Key NPR recommendations include:Conduct follow-on analysis to set goals for future nuclear reductions below the levels
expected in New START, while strengthening deterrence of potential regional adversaries,
strategic stability vis-à-vis Russia and China, and assurance of our allies and partners.

Address non-strategic nuclear weapons, together with the non-deployed nuclear weaponsof both sides, in any post-New START negotiations with Russia.

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Implement U.S. nuclear force reductions in ways that maintain the reliability andeffectiveness of security assurances to our allies and partners. The United States willconsult with allies and partners in developing its approach to post-New START
negotiations.

Strengthening Regional Deterrence and Reassuring U.S. Allies and Partners
The United States is fully committed to strengthening bilateral and regional security ties andworking with allies and partners to adapt these relationships to 21st century challenges. Suchsecurity relationships are critical in deterring potential threats, and can also serve our nonproliferation goals – by demonstrating to neighboring states that their pursuit of nuclear weapons
will only undermine their goal of achieving military or political advantages, and by reassuring
non-nuclear U.S. allies and partners that their security interests can be protected without theirown nuclear deterrent capabilities.
U.S. nuclear weapons have played an essential role in extending deterrence to U.S. allies andpartners against nuclear attacks or nuclear-backed coercion by states in their region that possessor are seeking nuclear weapons. A credible U.S. “nuclear umbrella” has been provided by a
combination of means – thestrategic forces of the U.S. Triad,
non-strategic nuclear weapons
deployed forward in key regions,and U.S.-based nuclear weaponsthat could be deployed forward
quicklytomeetregional
contingencies. The mix ofdeterrence means has varied overtime and from region to region.
In Europe, forward-deployed U.S.
nuclear weapons have been reduced
Defense Secretary Robert M. Gates conducts a press conference following
the NATO Defense Ministerial in Istanbul, Turkey, Feb. 5, 2010.
dramatically since the end of the
DoD photo by Cherie Cullen.
Cold War, but a small number ofU.S. nuclear weapons remain. Although the risk of nuclear attack against NATO members is at
an historic low, the presence of U.S. nuclear weapons – combined with NATO’s unique nuclear
sharing arrangements under which non-nuclear members participate in nuclear planning andpossess specially configured aircraft capable of delivering nuclear weapons – contribute to
Alliance cohesion and provide reassurance to allies and partners who feel exposed to regional
threats. The role of nuclear weapons in defending Alliance members will be discussed this year inxii
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connection with NATO’s revision of its Strategic Concept. Any changes in NATO’s nuclear
posture should only be taken after a thorough review within – and decision by – the Alliance.
In Asia and the Middle East – where there are no multilateral alliance structures analogous to
NATO – the United States has maintained extended deterrence through bilateral alliances andsecurity relationships and through its forward military presence and security guarantees. When
the Cold War ended, the United States withdrew its forward deployed nuclear weapons from the
Pacific region, including removing nuclear weapons from naval surface vessels and general
purpose submarines. Since then, it has relied on its central strategic forces and the capacity to redeploy nuclear systems in East Asia in times of crisis.
Although nuclear weapons have proved to be a key component of U.S. assurances to allies andpartners, the United States has relied increasingly on non-nuclear elements to strengthen regional
security architectures, including a forward U.S. conventional presence and effective theaterballistic missile defenses. As the role of nuclear weapons is reduced in U.S. national security
strategy, these non-nuclear elements will take on a greater share of the deterrence burden.
Moreover, an indispensable ingredient of effective regional deterrence is not only non-nuclear
but also non-military – strong, trusting political relationships between the United States and its
allies and partners.
Non-strategic nuclear weapons. The United States has reduced non-strategic (or “tactical”)
nuclear weapons dramatically since the end of the Cold War. Today, it keeps only a limited
number of forward deployed nuclear weapons in Europe, plus a small number of nuclear
weapons stored in the United States for possible overseas deployment in support of extended
deterrence to allies and partners worldwide. Russia maintains a much larger force of non-strategic
nuclear weapons, a significant number of which are deployed near the territories of several North
Atlantic Treaty Organization (NATO) countries.
The NPR concluded that the United States will:Retain the capability to forward-deploy U.S. nuclear weapons on tactical fighter-bombers
and heavy bombers, and proceed with full scope life extension for the B-61 bomb
including enhancing safety, security, and use control.

Retire the nuclear-equipped sea-launched cruise missile (TLAM-N).



Continue to maintain and develop long-range strike capabilities that supplement U.S.
forward military presence and strengthen regional deterrence.

Continue and, where appropriate, expand consultations with allies and partners to address
how to ensure the credibility and effectiveness of the U.S. extended deterrent. No changes

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in U.S. extended deterrence capabilities will be made without close consultations with ourallies and partners.
Sustaining a Safe, Secure, and Effective Nuclear Arsenal
The United States is committed to ensuring that its nuclear weapons remain safe, secure, andeffective. Since the end of U.S. nuclear testing in 1992, our nuclear warheads have been
maintained and certified as safe and reliable through a Stockpile Stewardship Program that has
extended the lives of warheads by refurbishing them to nearly original specifications. Looking
ahead three decades, the NPR considered how best to extend the lives of existing nuclear
warheads consistent with the congressionally mandated Stockpile Management Program andU.S. non-proliferation goals, and reached the following conclusions:

The United States will not conduct nuclear testing and will pursue ratification and entry
into force of the Comprehensive Nuclear Test Ban Treaty.



The United States will not develop new nuclear warheads. Life Extension Programs(LEPs) will use only nuclear components based on previously tested designs, and will notsupport new military missions or provide for new military capabilities.



The United States will study options for ensuring the safety, security, and reliability of
nuclear warheads on a case-by-case basis, consistent with the congressionally mandated
Stockpile Management Program. The full range of LEP approaches will be considered:refurbishment of existing warheads, reuse of nuclear components from different warheads,
and replacement of nuclear components.

In any decision to proceed to engineering development for warhead LEPs, the UnitedStates will give strong preference to options for refurbishment or reuse. Replacement of
nuclear components would be undertaken only if critical Stockpile Management Program
goals could not otherwise be met, and if specifically authorized by the President andapproved by Congress.

Consistent with these conclusions, the NPR recommended:

Funding fully the ongoing LEP for the W-76 submarine-based warhead and the LEP
study and follow-on activities for the B-61 bomb; and

Initiating a study of LEP options for the W-78 ICBM warhead, including the possibilityof using the resulting warhead also on SLBMs to reduce the number of warhead types.

In order to remain safe, secure, and effective, the U.S. nuclear stockpile must be supported by amodern physical infrastructure – comprised of the national security laboratories and a complex of
supporting facilities – and a highly capable workforce with the specialized skills needed to sustain

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the nuclear deterrent. As the United States reduces the numbers of nuclear weapons, thereliability of the remaining weapons in the stockpile – and the quality of the facilities needed tosustain it – become more important.
Human capital is also a concern. The national security laboratories have found it increasingly
difficult to attract and retain the most promising scientists and engineers of the next generation.
The Administration’s commitment to a clear, long-term plan for managing the stockpile, as wellas to preventing proliferation and nuclear terrorism will enhance recruitment and retention of thescientists and engineers of tomorrow, by providing the opportunity to engage in challenging andmeaningful research and development activities.
The NPR concluded:The science, technology and engineering base, vital for stockpile stewardship as well as
providing insights for non-proliferation, must be strengthened.



Increased investments in the nuclear weapons complex of facilities and personnel are
required to ensure the long-term safety, security, and effectiveness of our nuclear arsenal.
New facilities will be sized to support the requirements of the stockpile stewardship andmanagement plan being developed by the National Nuclear Security Administration.



Increased funding is needed for the Chemistry and Metallurgy Research Replacement
Project at Los Alamos National Laboratory to replace the existing 50-year old facility, andto develop a new Uranium Processing Facility at the Y-12 Plant in Oak Ridge, Tennessee.

Looking Ahead: Toward a World without Nuclear Weapons
Pursuing the recommendations of the 2010 Nuclear Posture Review will strengthen the securityof the United States and its allies and partners and bring us significant steps closer to the
President’s vision of a world without nuclear weapons.
The conditions that would ultimately permit the United States and others to give up their
nuclear weapons without risking greater international instability and insecurity are very
demanding. Among those conditions are success in halting the proliferation of nuclear weapons,much greater transparency into the programs and capabilities of key countries of concern,verification methods and technologies capable of detecting violations of disarmament obligations,enforcement measures strong and credible enough to deter such violations, and ultimately the
resolution of regional disputes that can motivate rival states to acquire and maintain nuclear
weapons. Clearly, such conditions do not exist today.
But we can – and must – work actively to create those conditions. We can take the practical steps
identified in the 2010 NPR that will not only move us toward the ultimate goal of eliminating
all nuclear weapons worldwide but will, in their own right, reinvigorate the global nuclear nonxv
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proliferation regime, erect higher barriers to the acquisition of nuclear weapons and nuclear
materials by terrorist groups, and strengthen U.S. and international security.

xvi
Nuclear Posture Review ReportINTRODUCTION
A year ago in Prague, President Obama offered a new direction for coping with 21st century
nuclear dangers, declaring that to overcome grave and growing threats of nuclear terrorism andnuclear proliferation, the United States will “seek the peace and security of a world without
nuclear weapons.” He recognized that such an ambitious goal could not be reached quickly –perhaps, he said, not in his lifetime. But the President expressed his determination to takeconcrete steps toward that goal, including by reducing U.S. nuclear weapons and their role in
U.S. national security strategy. At the same time, he pledged that as long as nuclear weapons
exist, the United States will maintain a safe, secure, and effective arsenal, both to deter potential
adversaries and to assure U.S. allies and other security partners that they can count on America’s
security commitments.
This Nuclear Posture Review (NPR) report outlines the Administration’s approach to promoting
the President’s agenda for reducing nuclear dangers and pursuing the goal of a world without
nuclear weapons – while simultaneously advancing broader U.S. security interests, consistent
with the President’s national security priorities and the supporting defense strategy objectives
identified in the 2010 Quadrennial Defense Review. The 2010 NPR represents the thirdcomprehensive assessment of U.S. nuclear policy and strategy conducted by the United Statessince the end of the Cold War. Previous reviews were completed in 1994 and 2001.
As mandated by Congress, the 2010 NPR was conducted by the Secretary of Defense in
consultation with the Secretaries of State and Energy. Within the Department of Defense, thereview was led jointly by the Office of the Secretary of Defense and the Joint Staff. The Military
Departments and Combatant Commands also contributed to the analytical work; there was
especially close collaboration with U.S. Strategic Command. Because of the breadth of issues
addressed, the review involved a number of additional departments and agencies, including the
Departments of Homeland Security and Treasury, and the Office of the Director of National
Intelligence. The review also benefited from extensive consultations with Congress, U.S. allies,
and other interested stakeholders. The National Security Council and its supporting interagency
bodies met throughout the review to consider key issues of strategy and policy.
In Presidential guidance initiating the NPR, the President called for a thorough review of U.S.
nuclear weapons policies and force posture. He directed that the review bring forward options fordiscussion aimed at multiple objectives: reducing the role and numbers of U.S. nuclear weapons;
strengthening deterrence of adversaries; reassuring allies and partners, who depend on the U.S.
commitment to extended deterrence; enhancing strategic stability; and moving demonstrably
toward the ultimate goal of the elimination of nuclear weapons.

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A key premise of the 2010 NPR was that any successful strategy for achieving these objectives
must be balanced, with movement in one area enabling and reinforcing progress in other areas.
For example, increased infrastructure investment and a sound Stockpile Stewardship Program
will facilitate reductions in both deployed and non-deployed nuclear weapons. The elements ofsuch a strategy must also be integrated, both nationally – across federal agencies and between theexecutive and legislative branches – and internationally among a wide range of partner
governments. And an effective strategy must be sustained over time, with support from a long
succession of U.S. Administrations and Congresses. A balanced, integrated, and sustained
strategy will require a strong bipartisan consensus. Forging such a consensus is a central purposeof this NPR.
After describing fundamental changes in the international security environment and U.S.
adjustments to date, the NPR report focuses on five key objectives of our nuclear weapons
policies and posture:
1. Preventing nuclear proliferation and nuclear terrorism;
2. Reducing the role of U.S. nuclear weapons in U.S. national security strategy;
3. Maintaining strategic deterrence and stability at lower nuclear force levels;
4. Strengthening regional deterrence and reassuring U.S. allies and partners; and5. Sustaining a safe, secure, and effective nuclear arsenal.
A final section of the NPR considers the path ahead for U.S. nuclear strategy and posture overthe coming years and decades.

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The international security environment has changed dramatically since the end of the Cold War.
The threat of global nuclear war has become remote, but the risk of nuclear attack has increased.

The Threat of Nuclear Proliferation and Nuclear Terrorism
The most immediate and extreme threat today is nuclear terrorism. Al Qaeda and their extremist
allies are seeking nuclear weapons. We must assume they would use such weapons if they
managed to obtain them. Although terrorist groups are currently believed to lack the resources to
produce weapons-usable nuclear material themselves, the vulnerability to theft or seizure of vast
stocks of such nuclear materials around the world, and the availability of sensitive equipment andtechnologies in the nuclear black market, create a serious risk that terrorists may acquire what
they need to build a nuclear weapon.
To date, the international community has made progress toward achieving a global “lock down”
of nuclear weapons, materials, and associated technology, but much more work needs to be done.
In addition, the United States and the international community have improving but currently
insufficient capabilities to detect, interdict, and defeat efforts to covertly deliver nuclear materials
or weapons—and if an attack occurs, to respond to minimize casualties and economic impact aswell as to attribute the source of the attack and take strong action.
Today’s other pressing threat is nuclear proliferation. Additional countries – especially those atodds with the United States, its allies and partners, and the broader international community –mayacquirenuclearweapons. In pursuit of
their nuclear ambitions,North Korea and Iran
have
violated
nonproliferation obligations,defied directives of theUnited Nations Security
Council, pursued missile
delivery capabilities, andresistedinternational
efforts to resolve through President Barack Obama chairs a United Nations Security Council meeting at UN
Headquarters in New York, N.Y., Sept. 24, 2009. Official White House photo by
diplomatic means the crises Pete Souza.

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they have created. Their illicit supply of arms and sensitive material and technologies hasheightened global proliferation risks and regional tensions. Their provocative behavior has
increased instability in their regions. Continued non-compliance with non-proliferation norms
by these and other countries would seriously weaken the Nuclear Non-Proliferation Treaty(NPT), with adverse security implications for the United States and the international community
at large.
The potential for regional aggression by these states raises challenges not only of deterrence, butalso of reassuring U.S. allies and partners. In the Cold War, our allies sought assurance that theywould remain safe in the face of Soviet threats because the United States was demonstrablycommitted to their security. Today’s environment is quite different. Some U.S. allies are
increasingly anxious about changes in the security environment, including nuclear and missile
proliferation, and desire reassurance that the United States will remain committed to theirsecurity. A failure of reassurance could lead to a decision by one or more non-nuclear states toseek nuclear deterrents of their own, an outcome which could contribute to an unraveling of the
NPT regime and to a greater likelihood of nuclear weapon use.
Despite these challenges, the NPT remains a cornerstone of the non-proliferation regime and has
served the international community well over the past four decades. Its fundamental bargain isstill sound: all parties have a right to peaceful nuclear power; states without nuclear weapons
forsake them; and those with nuclear weapons work towards disarmament. However, with clear
evidence of non-compliance with the NPT, the non-proliferation regime urgently requires
strengthening.
Further, the International Atomic Energy Agency (IAEA), the international body charged with
applying safeguards to ensure that nuclear facilities and materials are used only for peacefulpurposes, currently lacks sufficient resources and authorities necessary to carry out its mission
effectively.

Strategic Stability with Russia and China
While facing the urgent threats of nuclear terrorism and nuclear proliferation, the United States
must continue to address the more familiar challenge of ensuring strategic stability with existing
nuclear powers – most notably Russia and China. Russia remains America’s only peer in the areaof nuclear weapons capabilities. But the nature of the U.S.-Russia strategic and political
relationship has changed fundamentally since the days of the Cold War. Policy differences
continue to arise between the two countries, and Russia continues to modernize its stillformidable nuclear forces. But Russia and the United States have increased their cooperation inareas of shared interest, including preventing nuclear proliferation and nuclear terrorism. And theprospects for military confrontation have declined dramatically in recent decades.

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While the United States and Russia have reduced deployed nuclear weapons by about 75 percent
since the end of the Cold War, each still retains more nuclear weapons than necessary for stable
deterrence. As the United States and Russia reduce their deployed strategic nuclear weapons anddelivery vehicles under the New Strategic Arms Reduction Treaty (New START) and a followon agreement to it, maintaining a stable bilateral balance and avoiding dangerous nuclear
competition will be key objectives.
The United States and China are increasingly interdependent and their shared responsibilities foraddressing global security threats, such as WMD proliferation and terrorism, are growing. The
United States welcomes a strong, prosperous, and successful China that plays a greater global rolein supporting international rules, norms, and institutions.
At the same time, the United States and China’s Asian neighbors remain concerned about thepace and scope of China’s current military modernization efforts, including its quantitative andqualitative modernization of its nuclear capabilities. China’s nuclear arsenal remains muchsmaller than the arsenals of Russia and the United States. But the lack of transparency
surrounding its programs – their pace and scope as well as the strategy and doctrine guiding them– raises questions about China’s future strategic intentions.

Adapting to a Changed Security Environment
These changes in the nuclear threat environment – especially the heightened concern about
nuclear terrorism and nuclear proliferation and the less dangerous strategic interaction between
the United States and Russia – have not emerged overnight. They have developed over the lasttwenty years, and Administrations of both parties have responded with modifications of U.S.
nuclear weapons policies and force posture. But those modifications have not gone far or fastenough. As the President has said, we have to “put an end to Cold War thinking.”

The United States has begun to shift our focus to the dangers of nuclear proliferation andnuclear terrorism, but we need to intensify our efforts to build broad international
support for the rigorous measures needed to prevent these dangers.

The United States has sought to prevent the emergence of new regional nuclear-armed
states, but we need to do more to enhance regional security architectures to reassure ourallies and partners that our commitments to their defense will remain strong and reliable.



The United States and Russia have deeply reduced their nuclear forces from Cold War
levels, but both still retain many more nuclear weapons than needed.

The United States has reduced our reliance on nuclear weapons as Cold War nuclear
rivalries have eased and as our conventional military forces and missile defense capabilities

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have strengthened, but we have sent mixed signals about the importance we place on
nuclear weapons in our national security strategy.


The United States has maintained a safe, secure, and effective nuclear stockpile without
nuclear testing since 1992, but significant investments are needed in both physical andhuman capital to ensure that the stockpile can be maintained without ever needing to test
again.

The growing dangers of nuclear proliferation and nuclear terrorism have altered the hierarchy of
our nuclear concerns and strategic objectives. In coming years, we must give top priority to
discouraging additional countries from acquiring nuclear weapons capabilities and stopping
terrorist groups from acquiring the materials to build nuclear bombs. At the same time, we must
continue to maintain stable strategic relationships with Russia and China and counter threats
posed by any emerging nuclear-armed states, thereby protecting the United States and our allies
and partners against nuclear threats or intimidation, and reducing any incentives our non-nuclear
allies and partners might have to seek their own nuclear deterrents.

Implications for U.S. Nuclear Weapons Policies and Force Structure
The massive nuclear arsenal we inherited from the Cold War era of bipolar militaryconfrontation is poorly suited to address the challenges posed by suicidal terrorists and unfriendly
regimes seeking nuclear weapons. Therefore, it is essential that we better align our nuclear
policies and posture to our most urgent priorities – preventing nuclear terrorism and nuclear
proliferation.
This does not mean that our nuclear deterrent has become irrelevant. Indeed, as long as nuclear
weapons exist, the United States will maintain safe, secure, and effective nuclear forces, including
deployed and stockpiled nuclear weapons, highly capable nuclear delivery systems and commandand control capabilities, and the physical infrastructure and the expert personnel needed tosustain them. These nuclear forces will continue to play an essential role in deterring potential
adversaries, reassuring allies and partners around the world, and promoting stability globally andin key regions.
But fundamental changes in the international security environment in recent years – including
the growth of unrivaled U.S. conventional military capabilities, major improvements in missile
defenses, and the easing of Cold War rivalries – enable us to fulfill those objectives atsignificantly lower nuclear force levels and with reduced reliance on nuclear weapons. Therefore,
without jeopardizing our traditional deterrence and reassurance goals, we are now able to shape
our nuclear weapons policies and force structure in ways that will better enable us to meet today’s
most pressing security challenges.

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Nuclear Posture Review ReportTHE CHANGED – AND CHANGING – NUCLEAR SECURITY ENVIRONMENT

By reducing the role and numbers of U.S. nuclear weapons – and thereby demonstratingthat we are meeting our NPT Article VI obligation to make progress toward nuclear
disarmament – we can put ourselves in a much stronger position to persuade our NPT
partners to join with us in adopting the measures needed to reinvigorate the nonproliferation regime and secure nuclear materials worldwide against theft or seizure byterrorist groups.



By maintaining a credible nuclear deterrent and reinforcing regional security architectureswith missile defenses and other conventional military capabilities, we can reassure our
non-nuclear allies and partners worldwide of our security commitments to them andconfirm that they do not need nuclear weapons capabilities of their own.



By pursuing a sound Stockpile Management Program for extending the life of U.S.
nuclear weapons, we can ensure a safe, secure, and effective deterrent without thedevelopment of new nuclear warheads or further nuclear testing.



By modernizing our aging nuclear
weapons-supporting
facilities
andinvesting in human capital, we cansubstantially reduce the number ofstockpiled nuclear weapons we retain as ahedge against technical or geopoliticalsurprise, accelerate the dismantlement of
nuclear weapons no longer required forour deterrent, and improve ourunderstanding of foreign nuclear weapons
activities.



By promoting strategic stability with
Russia and China and improving
transparency and mutual confidence, we
can help create the conditions for moving
toward a world without nuclear weapons
and build a stronger basis for addressing
the threats of nuclear proliferation andnuclear terrorism.



By working to reduce the salience of
nuclear weapons in international affairs
andmovingstep-by-steptowardVice President Joseph R. Biden delivers a speech on
nuclear security and implementing the President’s
Prague agenda before Secretary of Defense Robert
Gates, Secretary of Energy Steven Chu, Vice
Chairman of the Joint Chiefs of Staff General James
Cartwright, and several hundred guests, at the
National Defense University on Feb. 18, 2010.
National Defense University photo.

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eliminating them, we can reverse the growing expectation that we are destined to live in aworld with many nuclear-armed states, and decrease incentives for additional countries tohedge against an uncertain and dangerous future by pursuing nuclear options of theirown. Creating these conditions will reduce the likelihood of nuclear weapon use.
In sum, the security environment has changed in fundamental ways since the end of the Cold
War. The landscape of threats and challenges has evolved. But a changing landscape has alsobrought with it some valuable new opportunities. Accordingly, U.S. policy priorities must shift.
The U.S. policy agenda must reflect a clear and current understanding of how U.S. nuclear
strategy and posture shape these international dynamics.

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AND NUCLEAR TERRORISM
As part of our effort to move toward a world free of nuclear weapons, the United States will lead
expanded international efforts to rebuild and strengthen the global nuclear non-proliferation
regime and to accelerate efforts to prevent nuclear terrorism. Concerns have grown in recent
years that unless today’s dangerous trends are arrested and reversed, before long we will be living
in a world with a steadily growing number of nuclear-armed states and an increasing likelihoodof terrorists getting their hands on nuclear weapons. Therefore, for the first time, the 2010 NPR
places this priority atop the U.S. nuclear agenda.
The United States is committed to renewing and strengthening the Nuclear Non-Proliferation
Treaty (NPT) and the global nuclear non-proliferation regime it anchors to cope with thechallenges of non-compliance and of the growth of nuclear power. We support expanding accessto the benefits of peaceful nuclear technology, but this must be done in a way that does notpromote proliferation of nuclear weapons capabilities. To strengthen the regime, the UnitedStates seeks to champion and reaffirm through its own actions the grand bargain that underpins
the treaty: states without nuclear weapons will not acquire them, states with nuclear weapons will
move toward disarmament, and all Parties can have access to peaceful nuclear energy undereffective verification.
As part of this effort, the United States seeks to bolster the nuclear non-proliferation regime by:Reversing the nuclear ambitions of North Korea and Iran. We have demonstrated that weare prepared to engage multilaterally and bilaterally with these states to arrive at
negotiated solutions that provide for their political and economic integration with theinternational community, while verifiably confirming they are not pursuing nuclear
weapons capabilities. However, their continued defiance of international norms andagreements will lead only to their further isolation and increasing international pressure.

Strengthening International Atomic Energy Agency (IAEA) safeguards. NPT Members,
particularly non-nuclear weapons states, rely for security on assurances that countries will
not divert nuclear material to illicit nuclear weapons programs. IAEA safeguards are
essential in maintaining that assurance. To deter and detect safeguards violations, the
IAEA must be given additional financial resources and verification authorities, and all
countries should adhere to the IAEA Additional Protocol. The United States is committed
to expanding financial support for the regular IAEA budget and will continue to push forstronger institutional support from other states, while we continue to increase our own
extra-budgetary contributions. The U.S. Next Generation Safeguards Initiative will assist
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PREVENTING NUCLEAR PROLIFERATION AND NUCLEAR TERRORISM

the IAEA to confront new challenges far into the future by helping develop the tools,
authorities, capabilities, technologies, expertise, and resources needed to meet current andfuture safeguard challenges.
Creating consequences for non-compliance. It is not enough to detect non-compliance;
violators must know that they will face consequences when they are caught. Moreover,states that violate their obligations must not be able to escape the consequences of their
non-compliance by withdrawing from the NPT.



Impeding sensitive nuclear trade. National and multilateral export and border controls
must be strengthened, financial and other tools must be used to disrupt illicit proliferation
networks, and tighter restrictions must be placed on the transfer of dual-use enrichment
and reprocessing technologies. The United States has increased its funding to help
countries improve strategic trade controls and improve targeting and inspection at bordercrossings. We also support development of a United Nations Security Council Resolution
1540 “trust fund” to assist countries in meeting their obligations under the resolution,
including developing and enforcing national export controls to prevent non-state actors
from obtaining weapons of mass destruction (WMD)-related materials and technology.
We are implementing President Obama’s pledge to make the Proliferation Security
Initiative into a durable international institution, under which over 90 countries
coordinate, share intelligence, and build capacity to interdict WMD-related transfers. And
the United States is working to detect and disrupt the financing of nuclear proliferationand terrorism by identifying and prosecuting its networks and establishing international
standards and best practices.



Promoting the peaceful uses of nuclear energy without increasing proliferation risks.
President Obama has called for the development of a new framework for international
nuclear energy cooperation, which the United States is pursuing with the international
community through the Global Nuclear Energy Partnership, which includes 25 partnerand 31 observer nations. To reduce incentives for countries to pursue indigenous fuelcycle facilities, this new framework should include international fuel banks, such as theRussian Angarsk fuel bank approved by the IAEA in February 2010, multilateral fuelsupply assurances, agreements by suppliers to take back spent fuel, and spent fuelrepositories. Cradle-to-grave nuclear fuel management could be one important element of
this new framework. The United States will also continue to assist other countries inbenefitting from the other peaceful applications of nuclear materials, including for
medical and agricultural uses and pure research.

The United States is committed to improving nuclear security worldwide in order to prevent
nuclear terrorism. This cannot be accomplished by the United States alone. All states have a

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fundamental responsibility to ensure the security and control of nuclear materials and weapons intheir possession. Further, this ambitious agenda requires the active engagement of a broadcoalition of nations acting in concert. The United States has given high priority to strengthening
and accelerating international efforts to prevent nuclear terrorism by:

Pursuing aggressively the President’s
Prague initiative, endorsed in United
Nations Security Council Resolution 1887,
to secure all vulnerable nuclear materials
worldwide. The United States will bedoing so by expanding our cooperation
with other countries and strengthening
nuclear security standards, practices, andinternational safeguards.



Hosting the April 2010 Nuclear Security
Summit, where leaders of over 40 countries
will commit to fight nuclear smuggling andterrorism and put in place effective nuclear
security measures.



Increasing funding in fiscal year (FY) 2011
for the National Nuclear Security
Administration’s nuclear non-proliferation
programs to $2.7 billion, an increase of
more than 25 percent.

Accelerating the Global Threat Reduction
Initiative to remove and secure high-priority vulnerable nuclear material around theworld, convert additional research reactors to operate on fuel that cannot be used innuclear weapons, and complete the repatriation of U.S.- and Russian-origin highly
enriched uranium from research reactors worldwide.



Accelerating the International Nuclear Material Protection and Cooperation Program toinstall nuclear security upgrades at Russian weapons complex sites and to expand
cooperation to new priority countries beyond Russia and the former Soviet Union.

Securing and eliminating weapons of mass destruction and their means of delivery
through cooperative threat reduction programs at the Departments of Defense, State, andEnergy, including the flagship Nunn-Lugar program. And assisting other countries tostrengthen their national capacities for nuclear materials protection, control, andIn May 2009, the National Nuclear Security
Administration (NNSA) announced the removal of
73.7 kilograms (162.5 pounds) of Russian-origin
highly enriched uranium (HEU) “spent” nuclear fuelfrom Kazakhstan. The material was removed andreturned to Russia for storage at a secure nuclear
facility in a series of four shipments between
December 2008 and May 2009. NNSA photo.

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PREVENTING NUCLEAR PROLIFERATION AND NUCLEAR TERRORISM

accounting through these programs, United Nations Security Council Resolution 1540,
and multilateral cooperative threat reduction programs.


Enhancing national and international capabilities to detect and interdict smuggled nuclear
materials. We are expanding the Container Security Initiative to screen U.S.-bound cargo
and the Second Line of Defense and Megaports programs to install radiation detectors at
key borders, airports, and seaports. We also are making the 77-country Global Initiative
to Combat Nuclear Terrorism a durable international institution. The Initiative
coordinates expertise, shares information, and integrates capabilities to deter, detect,interdict, mitigate, and respond to acts of nuclear terrorism.

Continue to strengthen our nuclear forensics efforts to improve the ability to identify thesource of nuclear material used or intended for use in a terrorist nuclear explosive device.



Renewing the U.S. commitment to hold fully accountable any state, terrorist group, orother non-state actor that supports or enables terrorist efforts to obtain or use weapons ofmass destruction, whether by facilitating, financing, or providing expertise or safe havenfor such efforts.

U.S. arms control and disarmament efforts, as well as other means of reducing the role of nuclear
weapons and moving toward a world without them, can make a major contribution to our goalof preventing nuclear proliferation and nuclear terrorism. By demonstrating that we takeseriously our NPT obligation to pursue nuclear disarmament, we strengthen our ability tomobilize broad international support for the measures needed to reinforce the non-proliferation
regime and secure nuclear materials worldwide. We are doing so by:Concluding a verifiable New Strategic Arms Reduction Treaty (New START) that limits
U.S. and Russian nuclear forces to levels well below those provided for in the 1991
START Treaty and the 2002 Moscow Treaty. U.S. ratification and subsequent
implementation of the new Treaty will be a concrete step on the path to nuclear
disarmament. The verification and transparency measures included in the Treaty will help
ensure stability and predictability in the U.S.-Russia strategic relationship.
Implementation of the treaty also will set the stage for deeper, verifiable nuclear
reductions. As the United States and Russia reduce their deployed weapons through New
START, the United States will pursue negotiations for deeper reductions and greatertransparency in partnership with Russia. Over time, we will also engage with other nuclear
weapon states, including China, on ways to expand the nuclear reduction process in the
future. This process should include efforts to improve transparency of states’ nuclear
policies, strategies, and programs.

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

Pursuing ratification and early entry into force of the Comprehensive Nuclear Test Ban
Treaty (CTBT). Ratification of the CTBT is central to leading other nuclear weapons
states toward a world of diminished reliance on nuclear weapons, reduced nuclear
competition, and eventual nuclear disarmament. U.S. ratification could also encourage
ratification by other states, including China, and provide incentives for the remaining
states to work toward entry into force of the treaty. Further, U.S. ratification of the
CTBT would enable us to encourage non-NPT Parties to follow the lead of the NPTrecognized Nuclear Weapon States in formalizing a heretofore voluntary testing
moratorium, and thus strengthen strategic stability by reducing the salience of nuclear
weapons in those states’ national defense strategies.

Seeking commencement of negotiations on a verifiable Fissile Material Cutoff Treaty(FMCT) to halt the production of fissile material for use in nuclear weapons. Given thatsome states continue to produce fissile materials for nuclear weapons, a multilateral,binding FMCT is needed to provide a quantitative cap on the potential growth of existing
nuclear weapons stockpiles. As a result, the United States is committed to prompt
negotiation of an FMCT with appropriate monitoring and verification provisions. The
United States recognizes that such negotiations will be complex and will take time;
however, a carefully crafted and verifiable FMCT will enhance our national security andcontribute to nuclear stability worldwide.

Working with the Russian Federation to jointly eliminate 68 tons of weapons-grade
plutonium no longer needed for defense purposes.



Initiating a comprehensive national
research and development program tosupport continued progress toward a world
free of nuclear weapons, including
expanded work on verification technologies
and the development of transparency
measures. Such technologies will help us
manage risk as we continue down this pathby ensuring that we are able to detect
potential clandestine weapons programs,
foreign nuclear materials, and weapons
production facilities and processes.

A Nuclear Forensics Ground Collection Team inprotection equipment screens a debris sample in afield exercise in Idaho. Defense Threat Reduction
Agency photo.

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REDUCING THE ROLE OF U.S. NUCLEAR WEAPONSThe role of nuclear weapons in U.S. national security and U.S. military strategy has been reduced
significantly in recent decades, but further steps can and should be taken at this time.
The fundamental role of U.S. nuclear weapons, which will continue as long as nuclear weapons
exist, is to deter nuclear attack on the United States, our allies, and partners.
During the Cold War, the United States also reserved the right to use nuclear weapons in
response to a massive conventional attack by the Soviet Union and its Warsaw Pact allies.
Moreover, after the United States gave up its own chemical and biological weapons (CBW)
pursuant to international treaties (while some states continued to possess or pursue them) the
United States reserved the right to employ nuclear weapons to deter CBW attack on the UnitedStates and its allies and partners.
Since the end of the Cold War, the strategic situation has changed in fundamental ways.
First, and foremost, the Soviet Union and the Warsaw Pact are gone. Russia is not an enemy,
and is increasingly a partner in confronting proliferation and other emerging threats. And all of
the non-Soviet former members of the Warsaw Pact are now members of the North Atlantic
Treaty Organization (NATO).
Second, U.S., allied, and partner conventional military capabilities now provide a wide range ofeffective conventional response options to deter and if necessary defeat conventional threats fromregional actors. Major improvements in missile defenses and counter-weapons of mass
destruction (WMD) capabilities have strengthened deterrence and defense against CBW attack.
Given these developments, the role of U.S. nuclear weapons to deter and respond to non-nuclear
attacks—conventional, biological, or chemical—has declined significantly. The United States
will continue to reduce the role of nuclear weapons in deterring non-nuclear attack.
To that end, the United States is now prepared to strengthen its long-standing “negative security
assurance” by declaring that the United States will not use or threaten to use nuclear weapons
against non-nuclear weapons states that are party to the Nuclear Non-Proliferation Treaty (NPT)and in compliance with their nuclear non-proliferation obligations.
This revised assurance is intended to underscore the security benefits of adhering to and fullycomplying with the NPT and persuade non-nuclear weapon states party to the Treaty to workwith the United States and other interested parties to adopt effective measures to strengthen the
non-proliferation regime.

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REDUCING THE ROLE OF U.S. NUCLEAR WEAPONSIn making this strengthened assurance, the United States affirms that any state eligible for theassurance that uses CBW against the United States or its allies and partners would face theprospect of a devastating conventional military response—and that any individuals responsible
for the attack, whether national leaders or military commanders, would be held fully accountable.
Given the catastrophic potential of biological weapons and the rapid pace of bio-technology
development, the United States reserves the right to make any adjustment in the assurance that
may be warranted by the evolution and proliferation of the biological weapons threat and U.S.
capacities to counter that threat.
In the case of countries not covered by this assurance – states that possess nuclear weapons andstates not in compliance with their nuclear non-proliferation obligations – there remains anarrow range of contingencies in which U.S. nuclear weapons may still play a role in deterring a
conventional or CBW attack
against the United States or its
allies and partners. The UnitedStates is therefore not preparedat the present time to adopt a
universal policy that the “solepurpose” of U.S. nuclear
weapons is to deter nuclear
attack on the United States andour allies and partners, but will
work to establish conditions
under which such a policy could
A medium-range ballistic missile with a separating target is launched fromthe Pacific Missile Range Facility on Jun. 22, 2007 (left photo). Minutes be safely adopted.
later, a Standard Missile (SM-3) was launched from the Aegis combat systemequipped Arleigh Burke class destroyer USS Decatur (DDG 73), successfullyintercepting the ballistic missile threat target (right photo). It was the firsttime such a test was conducted from a ballistic missile defense equipped-U.S.
Navy destroyer. U.S. Navy photos.

Yet this does not mean that our
willingness to use nuclear
weapons against countries notcovered by the new assurance has in any way increased. Indeed, the United States wishes to stressthat it would only consider the use of nuclear weapons in extreme circumstances to defend thevital interests of the United States or its allies and partners.
It is in the U.S. interest and that of all other nations that the nearly 65-year record of nuclear
non-use be extended forever. As President Ronald Reagan declared, “A nuclear war cannot be
won and must never be fought.”
In summary, the following principles will guide U.S. nuclear policies:

The United States will meet its commitment under Article VI of the NPT to pursue
nuclear disarmament and will make demonstrable progress over the next five to ten years.
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We will work to reduce the role and numbers of U.S. nuclear weapons while enhancing
security for ourselves, and our allies and partners.


The United States will continue to strengthen conventional capabilities and reduce therole of nuclear weapons in deterring non-nuclear attacks, with the objective of making
deterrence of nuclear attack on the United States or our allies and partners the sole
purpose of U.S. nuclear weapons.



The United States would only consider the use of nuclear weapons in extreme
circumstances to defend the vital interests of the United States or its allies and partners.



The United States will not use or threaten to use nuclear weapons against non-nuclear
weapons states that are party to the NPT and in compliance with their nuclear nonproliferation obligations.

17
Nuclear Posture Review Report

REDUCING THE ROLE OF U.S. NUCLEAR WEAPONS

18
Nuclear Posture Review ReportMAINTAINING STRATEGIC DETERRENCE AND
STABILITY AT REDUCED NUCLEAR FORCE LEVELS
Since the end of the Cold War, the United States and Russia have reduced operationallydeployed strategic nuclear weapons by approximately 75 percent, but both still retain many more
nuclear weapons than needed for deterrence. As an initial step, the Administration is committed
to working with Russia to preserve stability at significantly reduced nuclear force levels, throughthe New Strategic Arms Reduction Treaty (New START).
Beyond New START’s bilateral reductions in operationally deployed strategic forces, the NPR
examined ways to minimize potential nuclear instability by maximizing the decision time
provided to the President. Analysis also focused on our limited non-strategic nuclear weapons
posture. Moreover, in our commitment to the long-term goal of a world without nuclear
weapons, the NPR examined the full range of factors that will allow deeper reductions in U.S.
nuclear force levels.
It is also clear that maintaining strategic stability at reduced force levels will be an enduring andevolving challenge for the United States in the years ahead. Ongoing nuclear and other militarymodernization efforts by Russia and China compound this challenge, making the need forstrategic stability dialogues all the more critical.

Toward New START
U.S. strategic forces –comprised of submarinelaunched ballistic missiles(SLBMs), inter-continental
ballistic missiles (ICBMs),
and nuclear-capable heavy
bombers – continue tounderwrite deterrence of
nuclear attack against theUnited States, our allies, andpartners.
In the two decades since theend of the Cold War, theUnited States has reduced
deployedwarheadson

Secretary of State Hillary Rodham Clinton meets with Russian President
Dmitry Medvedev and Russian Foreign Minister Sergey Lavrov in Moscow,
Russia, Oct. 13, 2009. State Department photo.

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Nuclear Posture Review ReportMAINTAINING STRATEGIC DETERRENCE AND STABILITY AT REDUCED NUCLEAR FORCE LEVELS

strategic delivery systems by approximately 75 percent. The next step in this process is to replace
the expired 1991 START I Treaty with another verifiable agreement, New START. U.S. andRussian negotiators have recently completed this agreement.
An early task of the NPR was to develop U.S. positions for the New START negotiations. In sodoing, the review explored how a range of force structures might affect strategic stability at lower
numbers. Further the NPR considered whether the nuclear Triad of SLBMs, ICBMs, and heavy
bombers should be retained, and, if so, the necessary investments to sustain each Triad leg.
Determining New START Positions
Detailed NPR analysis of potential reductions in strategic weapons, conducted in spring 2009,concluded that the United States could sustain stable deterrence with significantly fewer
deployed strategic nuclear warheads, assuming parallel Russian reductions. The NPR analysis
considered several specific levels of nuclear weapons, all below current levels of approximately
2,200 deployed strategic warheads. Its conclusions, approved by the President, the Secretary of
Defense, the Joint Chiefs of Staff, and Commander, U.S. Strategic Command, formed the basis
for U.S. negotiations with Russia on New START. Because New START is intended to be only
an initial step in a continuing process of bilateral nuclear reductions, this initial analysis usedconservative assumptions to determine acceptable reductions in deployed strategic nuclear
weapons.
New START will result in significant mutual limits in deployed strategic nuclear warheads, well
below the 2,200 allowed under the Strategic Offensive Reductions Treaty (SORT), also known
as the Moscow Treaty, which expires in 2012.
The NPR conducted detailed analysis to determine an appropriate limit on nuclear warheads andstrategic delivery vehicles (SDVs). After determining that the United States should retain anuclear Triad under New START, the NPR went on to assess the appropriate force structure foreach Triad leg, namely the required numbers of strategic nuclear submarines (SSBNs) and
SLBMs, ICBMs, and nuclear-capable heavy bombers. Analysis focused on meeting four
requirements:
Supporting strategic stability through an assured second-strike capability;Retaining sufficient force structure in each leg to allow the ability to hedge effectively byshifting weight from one Triad leg to another if necessary due to unexpected technologicalproblems or operational vulnerabilities;Retaining a margin above the minimum required nuclear force structure for the possible
addition of non-nuclear prompt-global strike capabilities (conventionally-armed ICBMs
or SLBMs) that would be accountable under the Treaty; and20
Nuclear Posture Review ReportMAINTAINING STRATEGIC DETERRENCE AND STABILITY AT REDUCED NUCLEAR FORCE LEVELSMaintaining the needed capabilities over the next several decades or more, including
retaining a sufficient cadre of trained military and civilian personnel and adequate
infrastructure.

The 1991 START I, which expired in December 2009, limited the United States and Russia to1600 SDVs each. While the United States has approximately 1,200 SDVs still accountable under
the now-expired Treaty’s counting rules, fewer than 900 are associated with deployed strategic
nuclear weapons. The remainder are essentially “phantoms:” either conventional-only delivery
systems, particularly B-1B bombers and SSGN submarines (converted from SSBNs to carry
conventional sea-launched cruise missiles), or ICBM silos and heavy bombers that are no longer
in use but which have not yet been eliminated.
The Secretary of Defense, the Joint Chiefs of Staff, and the Commander of U.S. Strategic
Command supported reductions in limits on deployed as well as non-deployed U.S. SDVs. This
recommendation was conditional on the exclusion of conventional B-1B bombers and U.S.
SSGN submarines from accountability under the Treaty and the acceptance of the potential
conversion of a subset of the B-52 fleet to a conventional-only capability.
Building on NPR analysis, the United States and Russia have agreed to mutual limits under the
New START:

A limit of 1,550 accountable strategic warheads;

A separate limit of 700 deployed ICBMs, deployed SLBMs, and deployed nuclear-capableheavy bombers; and

A combined limit of 800 deployed and non-deployed ICBM launchers, SLBM launchers,
and nuclear capable heavy bombers.

Under the New START, dual-capable bombers will count as both one strategic delivery vehicle,
and as one warhead. This counting rule was adopted in recognition of the facts that heavy
bombers do not pose a first-strike threat to either side, and that on a day-to-day basis few or nobombers are loaded with nuclear weapons.
The Future of the Triad
After considering a wide range of possible options for the U.S. strategic nuclear posture,including some that involved eliminating a leg of the Triad, the NPR concluded that for planned
reductions under New START, the United States should retain a smaller Triad of SLBMs,
ICBMs, and heavy bombers. Retaining all three Triad legs will best maintain strategic stability atreasonable cost, while hedging against potential technical problems or vulnerabilities.

21
Nuclear Posture Review ReportMAINTAINING STRATEGIC DETERRENCE AND STABILITY AT REDUCED NUCLEAR FORCE LEVELSAir Force Global Strike Command officials assumed
responsibility for the Air Force's nuclear-capable bomber
force, including the B-52 Stratofortress and B-2 Spirit,
Feb. 1, 2010 (top photo). U.S. Air Force photo. An
unarmed Minuteman III intercontinental ballistic
missile is test launched off the California coast (bottom
right photo). U.S. Air Force photo. The U.S. Navy's
nuclear ballistic missile submarine USS MAINE(SSBN-741) conducts surface navigational operations(bottom left photo). Photo by PH1 Michael J. Rinaldi.

Each leg of the Triad has advantages thatwarrant retaining all three legs at this stage ofreductions. Strategic nuclear submarines(SSBNs) and the SLBMs they carry represent
the most survivable leg of the U.S. nuclear
Triad. Today, there appears to be no viable nearor mid-term threats to the survivability of U.S.
SSBNs, but such threats – or other technicalproblems – cannot be ruled out over the longterm. Single-warhead ICBMs contribute tostability, and like SLBMs are not vulnerable toair defenses. Unlike ICBMs and SLBMs,
bombers can be visibly deployed forward, as asignal in crisis to strengthen deterrence ofpotential adversaries and assurance of allies andpartners.

While significantly reducing the size of thetechnical hedge overall, the United States willretain the ability to “upload” some nuclear
warheads as a technical hedge against any future
problems with U.S. delivery systems or
warheads, or as a result of a fundamental deterioration of the security environment. For example,
if there were a problem with a specific ICBM warhead type, it could be taken out of service andreplaced with warheads from another ICBM warhead type, and/or nuclear warheads could be uploaded on SLBMs and/or bombers.
Sustaining Strategic Submarines (SSBNs)
The NPR concluded that ensuring a survivable U.S. response force requires continuous at-sea
deployments of SSBNs in both the Atlantic and Pacific oceans, as well as the ability to surge
additional submarines in crisis. To support this requirement, the United States currently has
fourteen nuclear-capable Ohio-class SSBNs.
By 2020, Ohio-class submarines will have been in service longer than any previous submarines.
Therefore as a prudent hedge, the Navy will retain all 14 SSBNs for the near-term. Depending
on future force structure assessments, and on how remaining SSBNs age in the coming years, theUnited States will consider reducing from 14 to 12 Ohio-class submarines in the second half of
this decade. This decision will not affect the number of deployed nuclear warheads on SSBNs.

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Nuclear Posture Review ReportMAINTAINING STRATEGIC DETERRENCE AND STABILITY AT REDUCED NUCLEAR FORCE LEVELS

To maintain an at-sea presence for the
long-term, the United States must continue
development of a follow-on to the Ohioclass submarine. The first Ohio-classsubmarine retirement is planned for 2027.
Since the lead times associated withdesigning, building, testing, and deploying
new submarines are particularly long, theSecretary of Defense has directed the Navy
to begin technology development of an
SSBN replacement.

Chief Torpedoman Eric Ragan looks through binoculars while
watching for a personnel transfer vessel to welcome the newest
members of the crew aboard nuclear ballistic missile submarine
USS Louisiana (SSBN 743). U.S. Navy photo by Electronics
Technician 3rd Class Dominique Cardenas.

Today, there appears to be no credible nearor mid-term threats to the survivability of
U.S. SSBNs. However, given the stakes involved, the Department of Defense will continue arobust SSBN Security Program that aims to anticipate potential threats and develop appropriate
countermeasures to protect current and future SSBNs.
A “DeMIRVed” ICBM ForceToday, the United States has 450 deployed silo-based Minuteman III ICBMs, each with one tothree warheads. The NPR considered the type and number of ICBMs needed for stable
deterrence, and to serve as a hedge against any future vulnerability of U.S. SSBNs.

The United States will “deMIRV” all deployed ICBMs, so that each Minuteman III ICBM has
only one nuclear warhead. (A “MIRVed” ballistic missile carries Multiple Independentlytargetable Reentry Vehicles (MIRVs). “DeMIRVing” will reduce each missile to a single
warhead.) This step will enhance the stability of the nuclear balance by reducing the incentives
for either side to strike first.
ICBMs provide significant advantages to the U.S. nuclear force posture, including extremely
secure command and control, high readiness rates, and relatively low operating costs. The
Department of Defense will continue the Minuteman III Life Extension Program with the aimof keeping the fleet in service to 2030, as mandated by Congress. Although a decision on any
follow-on ICBM is not needed for several years, studies to inform that decision are needed now.
Accordingly, the Department of Defense will begin initial study of alternatives in fiscal years (FY)2011 and 2012. This study will consider a range of possible deployment options, with theobjective of defining a cost-effective approach that supports continued reductions in U.S. nuclear
weapons while promoting stable deterrence.

23
Nuclear Posture Review ReportMAINTAINING STRATEGIC DETERRENCE AND STABILITY AT REDUCED NUCLEAR FORCE LEVELS

A Smaller and Highly Capable Nuclear Bomber ForceThe United States currently has 76 B52H bombers and 18 B-2 bombers thatcan be equipped with nuclear weapons.
The NPR determined that the Air Forcewill retain nuclear-capable bombers,
while converting some B-52Hs to aconventional-only role.
There are two principal reasons to retain
nuclear-capable – or more accurately
dual-capable – bombers. First, this
U.S. Air Force Capt. Joshua Logie, a B-52 Stratofortress pilotthassigned to the 20 Expeditionary Bomb Squadron, Barksdale capability provides a rapid and effective
Air Force Base, completes a flight on Feb. 9, 2010. U.S. Air
hedge against technical challenges with
Force photo by Staff Sgt. Jacob N. Bailey.
another leg of the Triad, as well as
geopolitical uncertainties. Second, nuclear-capable bombers are important to extended deterrenceof potential attacks on U.S. allies and partners. Unlike ICBMs and SLBMs, heavy bombers canbe visibly forward deployed, thereby signaling U.S. resolve and commitment in crisis.
U.S. dual-capable heavy bombers will not be placed on full-time nuclear alert, and so will
provide additional conventional firepower. The value of heavy bombers has been demonstrated
multiple times since World War II, including in Desert Storm, Kosovo, Operation Iraqi
Freedom, and Operation Enduring Freedom. The Department of Defense (DoD) will invest
more than $1 billion over the next five years to support upgrades to the B-2 stealth bomber.
These enhancements will help sustain survivability and improve mission effectiveness.
DoD is studying the appropriate mix of long-range strike capabilities, including heavy bombers
as well as non-nuclear prompt global strike, in follow-on analysis to the 2010 Quadrennial
Defense Review and the NPR. This analysis will affect the Department’s FY 2012 budget
proposal. In addition, the Air Force will conduct an assessment of alternatives to inform
decisions in FY 2012 about whether and (if so) how to replace the current air-launched cruise
missile (ALCM), which will reach the end of its service life later in the next decade.
DoD is also studying emerging challenges in the defense industrial base. As commitments are
made to life extend or replace current weapons, challenges are likely to emerge that could impair
needed progress. Steps can be taken now to mitigate some of these risks. An example is in the
production of solid rocket motors. Across the U.S. Government, there are three users of the solid
rocket motor industry: the National Aeronautics and Space Administration (NASA) for shuttle
boosters; the Air Force for Minuteman III, and the Navy for Trident II D-5. None of them has
immediate plans for a new large solid rocket motor design. With current plans to sustain the24
Nuclear Posture Review ReportMAINTAINING STRATEGIC DETERRENCE AND STABILITY AT REDUCED NUCLEAR FORCE LEVELSMinuteman III and Trident II strategic missiles for at least another two decades, the nation willneed technically skilled personnel to address the unknown future challenges associated with theaging of these systems. In order to revive the health of this industry, a research and development
program is being initiated that focuses on commonality between the Military Departments andjoint scalable flight test demonstrations.
In sum, the NPR concluded:
Stable deterrence can be maintained while reducing accountable U.S. strategic delivery
vehicles by approximately 50 percent from the START level and reducing accountablestrategic warheads by approximately 30 percent from the 2002 Moscow Treaty level.

During the ten-year duration of New START, the nuclear Triad of ICBMs, SLBMs, andheavy bombers will be maintained.



All U.S. ICBMs will be “de-MIRVed” to a single warhead each to increase stability.

Some ability to “upload” non-deployed nuclear weapons on existing delivery vehicles
should be retained as a hedge against technical or geopolitical surprise. Preference will begiven to upload capacity for bombers and strategic submarines.

Contributions by non-nuclear systems to U.S. regional deterrence and reassurance goals
will be preserved by avoiding limitations on missile defenses in New START and ensuringthat New START will not preclude options for using heavy bombers or long-range missile
systems in conventional roles.

The NPR conducted extensive analysis of alternative force structures under a New START
Treaty, and the Department of Defense will define its planned force structure under the Treaty
after taking account of this work. The United States will retain the ability to adjust this postureunder New START as needed to account for unexpected technological developments oroperational vulnerabilities, or geo-political surprise.

Maximizing Presidential Decision Time
Maximizing decision time for the President can further strengthen strategic stability at lower
force levels. Thus, the NPR considered changes to existing nuclear policies and postures that
directly affect potential crisis stability, including alert postures and the Nuclear Command,
Control, and Communication (NC3) system.
The NPR examined possible adjustments to the current alert posture of U.S. strategic forces.
Today, U.S. nuclear-capable heavy bombers are off full-time alert, nearly all ICBMs remain on
alert, and a significant number of SSBNs are at sea at any given time. The NPR concluded that
this posture should be maintained.

25
Nuclear Posture Review ReportMAINTAINING STRATEGIC DETERRENCE AND STABILITY AT REDUCED NUCLEAR FORCE LEVELSThe NPR reaffirmed the current practice of “open-ocean targeting” of all ICBMs and SLBMs sothat, in the highly unlikely event of an accidental launch, the missile would land in the open
ocean. The United States will ask Russia to reaffirm its commitment to continue this practice,which was mutually agreed in 1994.

Capt. Jeremy Ritter, 490th Missile Squadron (MS) flightcommander (right), and 1st Lt. William Springer, 490th MS
ICBM combat crew deputy commander (left), are "strappedin" and coordinating with the other launch crews to turn keys
to launch their missiles during a simulation in the Missile
Procedure Trainer. Crews "strap in" to prevent being thrownaround the capsule in the event that they are attacked. U.S.
Air Force photo by John Turner.

The NPR considered the possibility of
reducing alert rates for ICBMs and at-sea
rates of SSBNs, and concluded that such
steps could reduce crisis stability by giving
an adversary the incentive to attack before“re-alerting” was complete. At the sametime, the NPR concluded that returning
heavy bombers to full-time nuclear alert was
not necessary, assuming the other two Triadlegs retained a significant alert rate.

Looking to the longer term, the NPR
initiated studies that may lead to future
reductions in alert posture. For example, in
an initial study of possible follow-on systems
to the Minuteman III ICBM force, the Department of Defense will explore whether new modesof basing may ensure the survivability of this leg of the Triad while eliminating or reducing
incentives for prompt launch.
Additionally, the NPR examined the effectiveness of our command and control of U.S. nuclear
forces as an essential element in ensuring crisis stability, deterrence, and the safety, security andeffectiveness of our nuclear stockpile. The DoD NC3 system enables informed and timely
decisions by the President, the sole authority for nuclear employment, and execution of
Presidential nuclear response options.
The Secretary of Defense has directed a number of initiatives to further improve the resiliency of
the NC3 system and the capabilities for the fully deliberative control of the force in time of crisis.
The Department of Defense has taken steps to strengthen NC3 in the FY 2011 budget request,
including modernizing “legacy” single-purpose NC3 capabilities to meet current and projectedchallenges, and continuing to invest in secure voice conferences for NC3. An interagency study is
being initiated to determine the investment needed and the organizational structure best suited
to further strengthen the NC3 capabilities. This study, led by DoD, will begin in 2010 andprovide a long-term strategy that will inform out-year budget submission to Congress.
The NPR concluded that the United States will:

26
Nuclear Posture Review ReportMAINTAINING STRATEGIC DETERRENCE AND STABILITY AT REDUCED NUCLEAR FORCE LEVELSMaintain the current alert posture of U.S. strategic forces: U.S. nuclear-capable heavy
bombers off full-time alert, nearly all ICBMs on alert, and a significant number of SSBNs
at sea at any given time.

Continue the practice of “open-ocean targeting” of all ICBMs and SLBMs so that, in thehighly unlikely event of an unauthorized or accidental launch, the missile would land in
the open ocean. The United States will ask Russia to re-confirm its commitment to thispractice.



Make new investments in the U.S. command and control system to maximize Presidential
decision time in a nuclear crisis.



Explore new modes of ICBM basing that could enhance survivability and further reduce
any incentives for prompt launch. Such an assessment will be part of the Department of
Defense’s study of possible replacements for the current ICBM force.

Non-Strategic Nuclear Weapons
The United States has reduced its non-strategic (or “tactical”) nuclear weapons dramatically since
the end of the Cold War. Today, it keeps only a limited number of forward deployed nuclear
weapons in Europe, plus a small number of nuclear weapons stored in the United States,
available for global deployment in support of extended deterrence to allies and partners. Russia
maintains a much larger force of non-strategic nuclear weapons, a significant number of which
are deployed near the territories of several North Atlantic Treaty Organization (NATO)countries and are therefore a concern to NATO.
Non-strategic nuclear weapons, together with the non-deployed nuclear weapons of both sides,
should be included in any future reduction arrangements between the United States and Russia.
The United States will consult with our allies regarding the future basing of nuclear weapons in
Europe, and is committed to making consensus decisions through NATO processes. In
cooperation with allies and partners, the NPR has determined that the following steps will betaken.
The Air Force will retain a dual-capable fighter (the capability to deliver bothconventional and nuclear weapons) as it replaces F-16s with the F-35 Joint Strike Fighter.
As described in more detail below, the United States will also conduct a full scope B-61
(nuclear bomb) Life Extension Program to ensure its functionality with the F-35 and toinclude making surety – safety, security, and use control – enhancements to maintainconfidence in the B-61. These decisions ensure that the United States will retain thecapability to forward-deploy non-strategic nuclear weapons in support of its Alliancecommitments. These decisions do not presume the results of future decisions within

27
Nuclear Posture Review ReportMAINTAINING STRATEGIC DETERRENCE AND STABILITY AT REDUCED NUCLEAR FORCE LEVELSNATO about the requirements of nuclear deterrence and nuclear sharing, but keep open
all options.


The United States will retire the nuclear-equipped sea-launched cruise missile (TLAM-N).
This system serves a redundant purpose in the U.S. nuclear stockpile. It has been one of anumber of means to forward-deploy nuclear weapons in time of crisis. Other means
include forward-deployment of bombers with either bombs or cruise missiles, as well as
forward-deployment of dual-capable fighters. In addition, U.S. ICBMs and SLBMs arecapable of striking any potential adversary. The deterrence and assurance roles of TLAMN can be adequately substituted by these other means, and the United States remains
committed to providing a credible extended deterrence posture and capabilities.

As these NPR decisions are implemented and as we work with our allies and partners tostrengthen security while reducing the role and numbers of nuclear weapons, we will continue
close consultations with allies and partners. No changes to U.S. extended deterrence capabilities
will be made without continued close consultation with allies and partners.
These decisions are embedded in a broader approach to the emerging challenges of extended
deterrence that is reflected in not just the NPR but also the 2010 Ballistic Missile Defense
Review (BMDR) and 2010 Quadrennial Defense Review (QDR). The United States seeks tosignificantly strengthen regional security architectures in a comprehensive way. It seeks improved
peacetime approaches that fully integrate “whole of government” approaches as well as the “hard”
and “soft power” tools of the United States and its allies and partners, including an overallbalance of conventional military power that serves the purposes of security and peace. U.S.
nuclear weapons will play a role in the deterrence of regional states so long as those states havenuclear weapons, but the decisions taken in the NPR, BMDR, and QDR reflect the U.S. desire
to increase reliance on non-nuclear means to accomplish our objectives of deterring such states
and reassuring our allies and partners.

Reinforcing Strategic Stability
Given that Russia and China are currently modernizing their nuclear capabilities – and that bothare claiming U.S. missile defense and conventionally-armed missile programs are destabilizing –maintaining strategic stability with the two countries will be an important challenge in the years
ahead.
The United States will therefore pursue high-level, bilateral dialogues with Russia andChina aimed at promoting more stable, resilient, and transparent strategic relationships.

A strategic dialogue with Russia will allow the United States to explain that our missile defenses
and any future U.S. conventionally-armed long-range ballistic missile systems are designed toaddress newly emerging regional threats, and are not intended to affect the strategic balance with
28
Nuclear Posture Review ReportMAINTAINING STRATEGIC DETERRENCE AND STABILITY AT REDUCED NUCLEAR FORCE LEVELS

Russia. For its part, Russia could
explain its modernization programs,
clarify its current military doctrine(especially the extent to which itplaces importance on nuclear
weapons), and discuss steps it could
take to allay concerns in the Westabout its non-strategic nuclear
arsenal,suchasfurther
consolidating its non-strategic
systems in a small number of secure
facilities deep within Russia.
U.S. Navy Adm. Mike Mullen, Chairman of the Joint Chiefs of Staff,

A bilateral dialogue would also and Gen. Nikolai Makarov, Chief of the Russian Armed Forces General
Staff, address the media after counterpart talks in Moscow, Russia June
provide an opportunity for the two 26, 2009. DoD photo by Mass Communication Specialist 1st Classsides to consider wide-ranging Chad J. McNeeley.
missile defense cooperation, building on a joint statement signed by President Obama andPresident Medvedev in July 2009, and addressing such areas as integrating U.S. and Russian
sensors, developing joint missile defense architectures, and conducting joint testing, research anddevelopment, modeling and simulations, and exercises.
With China, the purpose of a dialogue on strategic stability is to provide a venue and mechanism
for each side to communicate its views about the other’s strategies, policies, and programs on
nuclear weapons and other strategic capabilities. The goal of such a dialogue is to enhance
confidence, improve transparency, and reduce mistrust. As stated in the 2010 Ballistic Missile
Defense Review Report, “maintaining strategic stability in the U.S.-China relationship is as
important to this Administration as maintaining strategic stability with other major powers.”
Building more stable strategic relationships with Russia and China could contribute to greater
restraint in those countries’ nuclear programs and postures, which could have a reassuring andstabilizing effect in their regions. It could also facilitate closer cooperation by those two countries
with the United States on measures to prevent nuclear proliferation and nuclear terrorism.

Future Nuclear Reductions
The United States is committed to the long-term goal of a world free of nuclear weapons. The
President has directed a review of potential future reductions in U.S. nuclear weapons below
New START levels. Several factors will influence the magnitude and pace of such reductions.
First, any future nuclear reductions must continue to strengthen deterrence of potential regional
adversaries, strategic stability vis-à-vis Russia and China, and assurance of our allies and partners.

29
Nuclear Posture Review ReportMAINTAINING STRATEGIC DETERRENCE AND STABILITY AT REDUCED NUCLEAR FORCE LEVELSThis will require an updated assessment of deterrence requirements; further improvements in
U.S., allied, and partner non-nuclear capabilities; focused reductions in strategic and nonstrategic weapons; and close consultations with allies and partners. The United States willcontinue to ensure that, in the calculations of any potential opponent, the perceived gains ofattacking the United States or its allies and partners would be far outweighed by the unacceptable
costs of the response.
Second, implementation of the Stockpile Stewardship Program and the nuclear infrastructure
investments recommended in the NPR will allow the United States to shift away from retaining
large numbers of non-deployed warheads as a hedge against technical or geopolitical surprise,allowing major reductions in the nuclear stockpile. These investments are essential to facilitating
reductions while sustaining deterrence under New START and beyond.
Third, Russia’s nuclear force will remain a significant factor in determining how much and how
fast we are prepared to reduce U.S. forces. Following ratification and entry into force of New
START, the Administration will pursue a follow-on agreement with Russia that binds bothcountries to further reductions in all nuclear weapons. Because of our improved relations, theneed for strict numerical parity between the two countries is no longer as compelling as it was
during the Cold War. But large disparities in nuclear capabilities could raise concerns on bothsides and among U.S. allies and partners, and may not be conducive to maintaining a stable,
long-term strategic relationship, especially as nuclear forces are significantly reduced. Therefore,
we will place importance on Russia joining us as we move to lower levels.
The President has directed follow-on analysis to the NPR that considers the above three factors,
and others as appropriate, to set goals for future U.S.-Russia reductions in nuclear weapons
below New START levels. The size and pace of U.S. nuclear force reductions will be
implemented in ways that maintain the reliability and effectiveness of our security assurances toour allies and partners.
Following ratification and entry into force of New START, the Administration will pursue
discussions with Russia on further reductions and transparency, which could be pursued throughformal agreements and/or parallel voluntary measures. These follow-on reductions should bebroader in scope than previous bilateral agreements, addressing all the nuclear weapons of thetwo countries, not just deployed strategic nuclear weapons.

30
Nuclear Posture Review ReportSTRENGTHENING REGIONAL DETERRENCE
AND REASSURING U.S. ALLIES AND PARTNERS
U.S. allies and partners are on the front lines of a changing global security environment. Someare enjoying unprecedented security and accordingly seek an acceleration of efforts to reducereliance on nuclear deterrence. Others face new challenges to their security and look to theUnited States for continued partnership in safeguarding their interests. Among their neighbors
are nuclear proliferators, potential smugglers of weapons of mass destruction (WMD), and weak
and failing states. Some also feel thepressures of neighboring major powers
asserting stronger regional roles, in somecases by nuclear means.
Accordingly, the United States is fullycommitted to strengthening bilateral andregional security ties and working closelywith its allies and partners to adapt these
relationships to emerging 21st century
requirements. We will continue to assure
An F-35 Joint Strike Fighter test aircraft undergoes a flightover Fort Worth, Texas. U.S. Air Force photo courtesy
our allies and partners of our commitment checkof Lockheed Martin.
to their security and to demonstrate thiscommitment not only through words, but also through deeds. This includes the continued
forward deployment of U.S. forces in key regions, strengthening of U.S. and allied non-nuclear
capabilities, and the continued provision of extended deterrence. Such security relationships are
critical not only in deterring potential threats, but can also serve our non-proliferation goals – bydemonstrating to neighboring states that their pursuit of nuclear weapons will only undermine
their goal of achieving military or political advantages, and by reassuring non-nuclear U.S. allies
and partners that their security interests can be protected without their own nuclear deterrent
capabilities. Further, the United States will work with allies and partners to strengthen the global
non-proliferation regime, especially the implementation of existing commitments within theirregions.
Security architectures in key regions will retain a nuclear dimension as long as nuclear threats to
U.S. allies and partners remain. U.S. nuclear weapons have played an essential role in extending
deterrence to U.S. allies and partners against nuclear attacks or nuclear-backed coercion by statesin their region that possess or are seeking nuclear weapons. A credible U.S. “nuclear umbrella”
has been provided by a combination of means – the strategic forces of the U.S. Triad, non-31
Nuclear Posture Review ReportSTRENGTHENING REGIONAL DETERRENCE AND REASSURING U.S. ALLIES AND PARTNERS

strategic nuclear weapons deployed forward in key regions, and U.S.-based nuclear weapons that
could be deployed forward quickly to meet regional contingencies.
The mix of deterrence means has varied over time and from region to region. During the Cold
War, the United States forward-deployed nuclear weapons in both Europe and Asia, and retained
the capability to increase those deployments if needed. At the end of the Cold War, a series ofsteps were taken to dramatically reduce the forward presence of U.S. nuclear weapons. Today,
there are separate choices to be made in partnership with allies in Europe and Asia about what
posture best serves our shared interests in deterrence and assurance and in moving toward aworld of reduced nuclear dangers.
In Europe, forward-deployed U.S. nuclear weapons have been reduced dramatically since the endof the Cold War, but a small number of U.S. nuclear weapons remain. Although the risk of
nuclear attack against North Atlantic Treaty Organization (NATO) members is at an historic
low, the presence of U.S. nuclear weapons – combined with NATO’s unique nuclear sharing
arrangements under which non-nuclear members participate in nuclear planning and possess
specially configured aircraft capable of delivering nuclear weapons – contribute to Alliancecohesion and provide reassurance to allies and partners who feel exposed to regional threats. The
role of nuclear weapons in defending Alliance members will be discussed this year in connection
with NATO’s revision of its Strategic Concept. Any changes in NATO’s nuclear posture should
only be taken after a thorough review within – and decision by – the Alliance.
In Asia and the Middle East – where there are no multilateral alliance structures analogous to
NATO – the United States has mainly extended deterrence through bilateral alliances andsecurity relationships and through its forward military presence and security guarantees. When
the Cold War ended, the United States withdrew its forward-deployed nuclear weapons from the
Pacific region, including removing nuclear weapons from naval surface vessels and general
purpose submarines. Since then, it has relied on its central strategic forces and the capacity to redeploy non-strategic nuclear systems in East Asia, if needed, in times of crisis.
The Administration is pursuing strategic dialogues with its allies and partners in East Asia andthe Middle East to determine how best to cooperatively strengthen regional security architectures
to enhance peace and security, and reassure them that U.S. extended deterrence is credible andeffective.

Regional Security Architectures
Enhancing regional security architectures is a key part of the U.S. strategy for strengthening
regional deterrence while reducing the role and numbers of nuclear weapons. These regional
security architectures include effective missile defense, counter-WMD capabilities, conventional
power-projection capabilities, and integrated command and control – all underwritten by strong

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Nuclear Posture Review ReportSTRENGTHENING REGIONAL DETERRENCE AND REASSURING U.S. ALLIES AND PARTNERS

political commitments. The goal is to ensure that if states attempt to attack U.S. forces or ourallies and partners, their attacks will be blunted and their aims denied by an enhanced set ofcapabilities – and that these states understand this reality and so are deterred from threatening or
undertaking such an attack.
Strengthening the non-nuclear elements of regional security architectures is vital to moving
toward a world free of nuclear weapons. The United States is positioned with capabilities acrossall domains to deter a wide range of attacks or forms of coercion against itself, its allies, andpartners. Credible deterrence depends on land, air, and naval forces capable of fighting limited
and large-scale conflicts in anti-access environments, as well as forces prepared to respond to thefull range of challenges posed by state and non-state groups. These forces are enabled by U.S.
capabilities to protect its assets in cyberspace and outer space and enhanced by U.S. capabilities
to deny adversaries’ objectives through resilient infrastructure (including command and control
systems), global basing and posture, and ballistic missile defense and counter-WMD capabilities.
Effective missile defenses are an essential element of the U.S. commitment to strengthen regional
deterrence against states of concern. Thus, while the United States will maintain a nuclear
deterrent to cope with such states, we are also bolstering the other critical elements of U.S.
deterrence, including conventional and ballistic missile defense capabilities.
The U.S. nuclear posture has a vital role to play in regional security architectures. Proliferatingstates must understand that any attack on the United States, or our allies and partners, will bedefeated, and any use of nuclear weapons will be met with a response that would be effective andoverwhelming. The President, as Commander-in-Chief, will determine the precise nature of any
U.S. response. But by pursuing nuclear weapons, such states must understand that they havesignificantly raised the stakes of any conflict.

Key Initiatives
Enduring alliances and broad-based political relationships are the foundation of strategic stability
and security. The United States will work closely with allies and partners across the globe toensure strong political and military ties, based on a common understanding of the challenges andopportunities of the emerging security environment, and strengthen regional deterrence. The
United States will:Continue to work extensively with allies and partners to build enhanced regional security
architectures, including non-nuclear capabilities for deterrence, helping to build partner
capacity, conducting combined exercises and training, and sustaining a forward presence
in key regions – as described in the 2010 Quadrennial Defense Review (QDR) and the2010 Ballistic Missile Defense Review (BMDR).

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Nuclear Posture Review ReportSTRENGTHENING REGIONAL DETERRENCE AND REASSURING U.S. ALLIES AND PARTNERS

Continue and, where appropriate, expand ongoing bilateral and multilateral discussions
with allies and partners, including in Europe, Northeast Asia, Southwest Asia, and the
Middle East, on the most effective ways to enhance regional stability in the near-term andlong-term.

Work with allies and partners to respond to regional threats by deploying effective missile
defenses, including in Europe, Northeast Asia, the Middle East, and Southwest Asia. This
includes pursuing a Phased Adaptive Approach in these regions – as described in detail inthe 2010 BMDR.

Strengthencounter-WMD
capabilities, including improved
U.S. and allied ability to defeat
chemical or biological attack.
The Department of Defense issignificantly bolstering defenses
against next-generation chemical
weapons and advanced biologicalweapons – these initiatives aredescribed in more detail in the2010 QDR.

Members of a joint U.S. and Australian Navy boarding teamconduct a security sweep aboard USNS Walter S. Diehl (T-AO
193), Oct. 29, 2009, during a boarding exercise in the South
China Sea as part of the Proliferation Security Initiative (PSI)
exercise Deep Sabre II. DoD photo by Mass Communication Spc.
2nd Class Seth Clarke.



Develop non-nuclear prompt
global strike capabilities. These
capabilities may be particularly
valuable for the defeat of time-urgent regional threats. The Administration is currently
examining the appropriate mix of such capabilities needed to improve our ability toaddress such regional threats, while not negatively affecting the stability of our nuclear
relationships with Russia or China. Specific recommendations will be made in the fiscal
year (FY) 2012 Department of Defense budget.



Develop and deploy, over the next decade, more effective capabilities for real-time
intelligence, surveillance, and reconnaissance capabilities, as well as intelligence analysis toenable rapid processing of data.

Expand and deepen consultations with allies and partners on policies and combined
postures to prevent proliferation and credibly deter aggression.

Retain the capability to forward-deploy U.S. nuclear weapons on tactical fighter-bombers(in the future, the F-35 Joint Strike Fighter) and heavy bombers (the B-2 and B-52H),
and will proceed with full scope life extension, including surety – safety, security, and use
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control – enhancements, for the B-61 nuclear bomb, which will be able to be carried by
the F-35 and B-2. These decisions do not presume what NATO will decide about future
deterrence requirements, but are intended to keep the Alliance’s options open and provide
capabilities to support other U.S. commitments.

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SUSTAINING A SAFE, SECURE,
AND EFFECTIVE NUCLEAR ARSENALThe United States is committed to ensuring that the nuclear weapons stockpile remains safe,
secure, and effective. The NPR has made a significant number of decisions to meet this longterm obligation.
Today’s nuclear weapons have aged well beyond their originally planned lifetime. Until 1992,
the U.S. nuclear stockpile was sustained through continual warhead-type replacement thatproceeded from design to test, deployment, and then retirement and replacement by a successor
design. Since then, the United States has stopped testing nuclear weapons, maintaining andcertifying our warheads as safe and reliable through a Stockpile Stewardship Program that has
extended the lives of some warheads by refurbishing them to nearly original specifications.
To sustain a safe, secure, and effective stockpile today, with the ultimate goal of a world free of
nuclear weapons in the future, we must prudently manage our nuclear stockpile and related Life
Extension Programs (LEPs), while cultivating the nuclear infrastructure, expert workforce, andleadership required to sustain it.

Managing the U.S. Nuclear Stockpile
The U.S. nuclear stockpile includes
both deployed and non-deployedwarheads. The United States has
additional
warheads
awaiting
dismantlement.
Deployed warheads include both
strategic (planned to be delivered atintercontinental
range
and
deployed on strategic submarines(SSBNs), intercontinental ballistic
missiles (ICBMs), and heavy
bombers)
andnon-strategic
weapons assigned a nuclear mission,
such as the B-61 bombs deployed inEurope. In the near- to mid-term,
the U.S. strategic deployed force

Secretary of Energy Steven Chu speaks at a dedication ceremony
recognizing the start-up of operations at the nation’s new facility forweapons-grade uranium. The Highly Enriched Uranium Materials
Facility (HEUMF) – the ultra-secure uranium warehouse at the Y-12
National Security Complex – replaces multiple aging buildings with asingle state-of-the-art storage facility. NNSA photo.

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will be reduced through arms control agreements with Russia, initially by the New Strategic
Arms Reduction Treaty (New START).
Non-deployed warheads provide logistics spares, support the surveillance program, and hedge
against technical or geopolitical surprise. Logistics spares enable the United States to maintain
desired quantities of deployed weapons during maintenance and surveillance where somewarhead components are destroyed and the warheads are not rebuilt for return to the stockpile.
Non-deployed warheads also provide a hedge against technological surprise, such as discovery ofa technical problem in a warhead that renders it (and all of its type) non-operational. They also
serve as a hedge against geopolitical surprise, such as an erosion of the security environment that
requires additional weapons to be uploaded on delivery systems. The non-deployed stockpile
currently includes more warheads than required for the above purposes, due to the limited
capacity of the National Nuclear Security Administration (NNSA) complex to conduct LEPs for
deployed weapons in a timely manner. Progress in restoring NNSA’s production infrastructure
will allow these excess warheads to be retired along with other stockpile reductions planned overthe next decade.
Warheads awaiting dismantlement are those in the queue for disassembly. Today, there are several
thousand nuclear warheads awaiting dismantlement, and this number will increase as weapons
are removed from the stockpile under New START. We anticipate it will take more than adecade to eliminate the dismantlement backlog. Investments to modernize the nuclear
infrastructure, outlined below, will ensure that the United States can continue to decrease thisbacklog in a responsible manner.
Looking ahead three decades, the NPR considered how best to extend the lives of existing
nuclear warheads consistent with the congressionally mandated Stockpile Management Programand U.S. non-proliferation goals. Over that period, every nuclear warhead now in the stockpile
will require some level of technical attention. Thus, the Stockpile Management Program will
outline ways to ensure the safety and security of warheads over time. While the generalparameters of this plan are discussed here, some key information about the specific numbers andtypes of warheads in different elements of the stockpile are classified, as are specific plans for their
future disposition, and will be briefed separately to Congress.
After consideration of how to best manage our current stockpile, the NPR reached the following
conclusions to guide future U.S. stockpile management decisions:

The United States will not conduct nuclear testing, and will pursue ratification and entry
into force of the Comprehensive Nuclear Test Ban Treaty.

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SUSTAINING A SAFE, SECURE, AND EFFECTIVE NUCLEAR ARSENALThe United States will not develop new nuclear warheads. Life Extension Programs will
use only nuclear components based on previously tested designs, and will not support new
military missions or provide for new military capabilities.



The United States will study options for ensuring the safety, security, and reliability of
nuclear warheads on a case-by-case basis, consistent with the congressionally mandated
Stockpile Management Program. The full range of LEP approaches will be considered:refurbishment of existing warheads, reuse of nuclear components from different warheads,
and replacement of nuclear components.

In any decision to proceed to engineering development for warhead LEPs, the UnitedStates will give strong preference to options for refurbishment or reuse. Replacement of
nuclear components would be undertaken only if critical Stockpile Management Program
goals could not otherwise be met, and if specifically authorized by the President andapproved by Congress.

The United States will retain the smallest possible nuclear stockpile consistent with ourneed to deter adversaries, reassure our allies, and hedge against technical or geopoliticalsurprise.

Using these guidelines, the United States will extend the life of nuclear warheads required for thesmaller force structure identified under New START. Consistent with this approach, the NPR
recommended that:

The Administration will fully fundthe ongoing LEP for the W-76
submarine-based warhead for a fiscal
year (FY) 2017 completion, and thefull scope LEP study and follow-on
activities for the B-61 bomb toensure first production begins in FY
2017.



The Nuclear Weapons Council will
initiate a study in 2010 of LEP Air Force maintenance technicians work on the B-61 bomb.
U.S. Air Force photo.
options for the W-78 ICBM warhead
to be conducted jointly by the National Nuclear Security Administration and theDepartment of Defense. This study will consider, as all future LEP studies will, thepossibility of using the resulting warhead also on multiple platforms in order to reduce thenumber of warhead types.

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SUSTAINING A SAFE, SECURE, AND EFFECTIVE NUCLEAR ARSENALThe United States will consider reductions in non-deployed nuclear warheads, as well as
acceleration of the pace of nuclear warhead dismantlement, as it implements a new
stockpile stewardship and management plan consistent with New START.

The National Nuclear Security Administration (NNSA), in close coordination with DoD, will
provide a new stockpile stewardship and management plan to Congress within 90 days,
consistent with the increases in infrastructure investment requested in the President’s FY 2011budget. As critical infrastructure is restored and modernized, it will allow the United States tobegin to shift away from retaining large numbers of non-deployed warheads as a technical hedge,
allowing additional reductions in the U.S. stockpile of non-deployed nuclear weapons over time.
The approach described here will ensure high confidence in the technical performance of
warheads retained in the stockpile. It will guarantee that their safety and security are aligned with
21st century requirements (and technical capabilities). At the same time, it will not develop new
nuclear warheads, and it will be structured so as not to require nuclear testing. Life Extension
Programs will use only nuclear components based on previously tested designs, and will notsupport new military missions or provide for new military capabilities. This approach sets a highstandard for the safety and security of U.S. nuclear weapons and, in support of nonproliferation
goals, positions the United States to encourage other nations to maintain the highest levels ofsurety for their nuclear stockpiles.

Critical Infrastructure and Human Capital
In order to sustain a safe, secure, and effective U.S. nuclear stockpile as long as nuclear weapons
exist, the United States must possess a modern physical infrastructure – comprised of thenational security laboratories and a complex of supporting facilities – and a highly capable
workforce with the specialized skills needed to sustain the nuclear deterrent and support the
President’s nuclear security agenda.
Today’s nuclear complex, however, has fallen into neglect. Although substantial science,technology, and engineering investments were made over the last decade under the auspices of
the Stockpile Stewardship Program, the complex still includes many oversized and costly-tomaintain facilities built during the 1940s and 1950s. Some facilities needed for working withplutonium and uranium date back to the Manhattan Project. Safety, security, and environmental
issues associated with these aging facilities are mounting, as are the costs of addressing them.
Responsible stockpile management and disarmament require not only infrastructure, but skilledscientists and engineers to manage these efforts. Like our infrastructure, over the last decade ourhuman capital base has been underfunded and underdeveloped. Our national security
laboratories have found it increasingly difficult to attract and retain the best and brightest
scientists and engineers of today. Morale has declined with the lack of broad, national consensus

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on the approach to sustaining warheads and nuclear technical capabilities. The cumulative loss offocus, expertise, and excellence on nuclear matters in the United States remains a significant
challenge. A strong national commitment to these important nuclear security objectives isessential to countering this trend.
Increased investments in the nuclear infrastructure and a highly skilled workforce are needed toensure the long-term safety, security, and effectiveness of our nuclear arsenal and to support thefull range of nuclear security work to include non-proliferation, nuclear forensics, nuclear,counter-terrorism, emergency management, intelligence analysis and treaty verification.
Such investments, over time, can reduce our reliance on large inventories of non-deployedwarheads to deal with technical surprise, thereby allowing additional reductions in the U.S.
nuclear stockpile and supporting our long-term path to zero. A revitalized infrastructure will also
serve to reduce the number of warheads retained as a geopolitical hedge, by helping to dissuade
potential competitors from believing they can permanently secure an advantage by deploying
new nuclear capabilities.
Efforts to strengthen the science, technology, and engineering base and address the problems in
the physical infrastructure will help with the human capital problem. A renewal of the sense ofnational purpose and direction in nuclear strategy will also be helpful. The President has clearly
outlined the importance of nuclear issues for our national security, and the importance of
keeping the U.S. nuclear deterrent safe, secure, and effective at the minimum numbers required.
Further, the Administration’s commitment to a clear and long-term plan for managing thestockpile ensures the scientists and engineers of tomorrow will have the opportunity to engage inchallenging research and development activities which is essential to their recruitment andretention.
A
modernnuclearinfrastructure and highly
skilled workforce is not only
consistent with our arms
controlandnonproliferation objectives; it isessential to them. By
certifying the reliability ofeach weapon type we retain,
the United States cancredibly assure non-nuclear
allies and partners they neednot build their own, while

Aerial photo of the Y-12 National Security Complex, in Oak Ridge, Tennessee.
Y-12 plays a vital role in the Department of Energy’s Nuclear Security Enterprise
helping ensure a safe and reliable U.S. nuclear weapons deterrent. Y-12 also
retrieves and stores nuclear materials, fuels the nation's naval reactors and performs
complementary work for other government and private-sector entities. Y-12 photo.

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seeking greater stockpile reductions than otherwise possible. Further, a corps of highly skilled
personnel will continue to expand our ability to understand the technical challenges associatedwith verifying ever deeper arms control reductions.
Through science and engineering programs that improve the analysis of the reliability of ourwarheads, we also enhance our ability to assess and render safe potential terrorist nuclear devices
and support other national security initiatives, such as nuclear forensics and attribution. Expert
nuclear scientists and engineers help improve our understanding of foreign nuclear weapons
activities, which is critical for managing risks on the path to zero. And, in a world with complete
nuclear disarmament, a robust intellectual and physical capability would provide the ultimate
insurance against nuclear break-out by an aggressor.
Additionally, the industrial base activities that support the nuclear enterprise also remain criticalto the nation’s deterrence posture. Increased surveillance of critical commercial sector humanskills, manufacturing capabilities, and sustainment capabilities is required to ensure thisinfrastructure remains viable to support the enterprise.
The NPR concluded that the following key investments were required to sustain a safe, secure,and effective nuclear arsenal:Strengthening the science, technology, and engineering (ST&E) base needed for
conducting weapon system LEPs, maturing advanced technologies to increase weapons
surety, qualification of weapon components and certifying weapons without nuclear
testing, and providing annual stockpile assessments through weapons surveillance. This
includes developing and sustaining high quality scientific staff and supporting
computational and experimental capabilities. The NNSA will develop a long-term strategy
that will describe the ST&E base required to meet the Stockpile Stewardship Program.
The report will be delivered to the Nuclear Weapons Council in 2011.



Funding the Chemistry and Metallurgy Research Replacement Project at Los Alamos
National Laboratory to replace the existing 50-year old Chemistry and Metallurgy
Research facility in 2021.

Developing a new Uranium Processing Facility at the Y-12 Plant in Oak Ridge, Tennessee
to come on line for production operations in 2021. Without an ability to produce
uranium components, any plan to sustain the stockpile, as well as support for our Navy
nuclear propulsion, will come to a halt. This would have a significant impact, not just on
the weapons program, but in dealing with nuclear dangers of many kinds.

More broadly, the Administration supports the needed recapitalization of the nuclear
infrastructure through fully funding the NNSA. New production facilities will be sized tosupport the requirements of the Stockpile Stewardship Program mandated by Congress and to42
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meet the multiple requirements of dismantling warheads and eliminating material no longer
needed for defense purposes, conducting technical surveillance, implementing life extension
plans, and supporting naval requirements. Some modest capacity will be put in place to surge
production in the event of significant geopolitical “surprise.”
Defense Department Leadership of the Nuclear Deterrence Mission
Sustaining a safe, secure, and effective nuclear arsenal requires sustained and effective leadership.
In recent years, it has been necessary for the Department of Defense to renew its commitment tothat leadership, following the cumulative loss of focus and expertise on nuclear matters within
DoD. The Department has taken a number of steps over the last two years to address these
problems, and this NPR reflects a continued high-level commitment to their implementation.
The Task Force on DoD Nuclear Weapons Management generated a large set ofrecommendations to the Secretary of Defense and the Military Departments. The Secretary of
Defense strongly endorsed the recommendations and took steps in 2008 to ensure their timely
implementation. U.S. Strategic Command initiated several efforts to address these findings andto ensure a renewed and sustained dedication, to and focus on, the strategic deterrence mission.
The U.S. Navy has been focused on continuous improvement of the nuclear enterprise for morethan twenty years; most recently evidenced by the establishment of the Nuclear Weapons Senior
Leadership Council and OPNAV Nuclear Weapons Council. The U.S. Air Force roadmap titled“Reinvigorating the Nuclear Enterprise” describes ongoing efforts, including the standing-up of
the new Air Force Global Strike Commandfor nuclear-capable bombers and ICBMs,
the consolidation of nuclear sustainment
efforts in Air Force Materiel Command andthe establishment of the Headquarters, U.S.
Air Force Assistant Chief of Staff, Strategic
Deterrence and Nuclear Integration(HAF/A10).
Maintaining leadership focus, expertise, andexcellence on nuclear capabilities is afundamental obligation of the Departmentof Defense. As the United States reduces therole and numbers of nuclear weapons,sustaining a cadre of talented and expert
leaders will become more, not less,important.

Defense Secretary Robert M. Gates tells Airmen at Minot Air
Force Base that the Air Force’s nuclear mission andmaintaining its long tradition of excellence are vital to thesecurity of the United States during a visit Dec. 1, 2008.
U.S. Air Force photo by Senior Airman Joe Rivera.

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LOOKING AHEAD:TOWARD A WORLD WITHOUT NUCLEAR WEAPONSThe U.S. nuclear posture is pivotal to international and national security. While the risk of allout nuclear war is much diminished relative to the Cold War, nuclear dangers persist and someare increasing. Even as we seek a future world free of nuclear weapons, we are realistic about theworld around us, recognizing that this goal will be a long-term effort, not the work of one
Administration.
During the Cold War, our nuclear weapons policies and forces were designed to meet two coregoals: to deter a massive nuclear or large-scale conventional, biological, or chemical attack by theSoviet Union and its allies; and to reassure our allies and partners that they could count on us tocarry out that mission effectively. At the peak of the Cold War, the United States had over
30,000 nuclear weapons, including thousands deployed in overseas locations on short-range
delivery systems. The U.S. nuclear weapons production complex constantly developed new types
of weapons.
Today, the reassurance mission remains, but the deterrence challenge is fundamentally different.
While we must maintain stable deterrence with major nuclear powers, the likelihood of major
nuclear war has declined significantly; thus far fewer nuclear weapons are needed to meet our
traditional deterrence and reassurance goals. Further, the United States today has the strongest
conventional military forces in the world. Our close allies and partners field much of the rest of
the world’s military power. Moreover, our most pressing security challenge at present ispreventing nuclear proliferation and nuclear terrorism, for which a nuclear force of thousands ofweapons has little relevance.
As a result of these changes, nuclear weapons play a much more circumscribed role in U.S.
national security strategy, a change reflected in the U.S. nuclear posture today. Since the end of
the Cold War two decades ago, the United States has cut deployed strategic weapons byapproximately 75 percent and has also substantially reduced the overall nuclear stockpile ofdeployed and non-deployed weapons. As this NPR report makes clear, more can and must bedone.
A key focus of the 2010 NPR was therefore to bring our nuclear weapons policies and force
posture into better alignment with today’s national security priorities. To that end, the NPR
decided on a number of steps, many of which have already been initiated or will be pursued in
the near term:

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Pursue rigorous measures to reinvigorate the Nuclear Non-Proliferation Treaty (NPT)and the broader non-proliferation regime, and secure vulnerable nuclear materials
worldwide against theft or seizure by terrorists;

Seek ratification and entry into force of the Comprehensive Nuclear Test Ban Treaty andprompt commencement of negotiations on a verifiable Fissile Material Cutoff Treaty;Increase efforts to improve nuclear forensics to attribute the source of any covert nuclear
attack, so that the United States can hold accountable any state, terrorist group, or othernon-state actor that supports or enables terrorist efforts to obtain or use nuclear weapons;

Adopt a strengthened “negative security assurance” declaring that the United States will
not use or threaten to use nuclear weapons against non-nuclear weapon states that are
party to the NPT and in compliance with their nuclear non-proliferation obligations;

Seek ratification and implementation of the New Strategic Arms Reduction Treaty (NewSTART) requiring substantial reductions in deployed U.S. and Russian nuclear forces;



Structure the reduced U.S. force in a way that promotes stability, including “deMIRVing” U.S. ICBMs;

Eliminate the Tomahawk, nuclear-equipped, sea-launched cruise missile (TLAM-N);

Strengthen regional security architectures and reinforce security commitments to allies
and partners by maintaining an effective nuclear umbrella while placing increased relianceon non-nuclear deterrence capabilities (e.g., missile defenses and conventional long-range
missiles);Work with NATO Allies on a new Strategic Concept that supports Alliance cohesion andsustains effective extended deterrence, while reflecting the role of nuclear weapons in
supporting Alliance strategy in the 21st century;Pursue high-level dialogues with Russia and China to promote more stable, transparent,
and non-threatening strategic relationships between those countries and the United States;Continue to posture U.S. forces and enhance command and control arrangements to
reduce further the possibility of nuclear weapons launches resulting from accidents,
unauthorized actions, or misperceptions and to maximize the time available to the
President to consider whether to authorize the use of nuclear weapons;

Implement well-funded stockpile management and infrastructure investment plans thatcan sustain a safe, secure, and effective nuclear arsenal at significantly reduced stockpile
levels without nuclear testing or the development of new nuclear warheads;

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LOOKING AHEAD: TOWARD A WORLD WITHOUT NUCLEAR WEAPONSComplete the Presidentially-directed review of post-New START arms control objectives,to establish goals for future reductions in nuclear weapons, as well as evaluating additional
options to increase warning and decision time, and to further reduce the risks of false
warning or misjudgments relating to nuclear use; and

Initiate a comprehensive national research and development program to support
continued progress toward a world free of nuclear weapons, including expanded work on
verification technologies.

This agenda encompasses a comprehensive set of concrete steps to reduce nuclear dangers to theUnited States and our allies and partners, to reduce the role and numbers of U.S. nuclear
weapons, and at the same time to ensure that nuclear deterrence remains effective for the
problems for which it is relevant in today’s world.
While the 2010 NPR focused principally on the near term, it also identified a number of longerterm steps to limit nuclear dangers, reduce the role and numbers of U.S. nuclear weapons, andstrengthen deterrence of potential adversaries and assurance of U.S. allies and partners. As such,
the NPR identified several important objectives toward which the United States should direct
future efforts:
Engage Russia, after ratification and entry into force of New START, in negotiations
aimed at achieving substantial further nuclear force reductions and transparency thatwould cover all nuclear weapons – deployed and non-deployed, strategic and nonstrategic;Adopt expanded measures to broaden cooperation and transparency, and strengthen
strategic stability with Russia and China;Continue efforts to strengthen regional security architectures and eliminate chemical andbiological weapons, so that over time all states possessing nuclear weapons can be secure in
making deterrence of nuclear attack the sole purpose of nuclear weapons;Continue to ensure that the United States sustains a safe, secure, and effective nuclear
arsenal as long as nuclear weapons exist;

Following substantial further nuclear force reductions with Russia, engage other states
possessing nuclear weapons, over time, in a multilateral effort to limit, reduce, andeventually eliminate all nuclear weapons worldwide;

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Improve nuclear physicalinfrastructure and humancapital to position the UnitedStates to safely reduce nuclear
weapons, and if international
conditions allow, eliminate
them altogether. In a world
where nuclear weapons had
been eliminated but nuclear
knowledge remains, having astrong infrastructure and baseof human capital would be
essential to deterring cheatingor breakout, or, if deterrence
failed, responding in a timely
fashion; andPresident Barack Obama and Russian President Dmitry Medvedev sign
documents on nuclear arms reduction at the Kremlin in Moscow, Jul. 6,
2009. Official White House photo by Chuck Kennedy.

Set a course for the verified elimination of all nuclear weapons and minimize risk ofcheating and breakout, through increasing transparency and investments in verification
technologies focused on nuclear warheads, rather than delivery vehicles.

Toward a World Free of Nuclear Weapons
The long-term goal of U.S. policy is the complete elimination of nuclear weapons. At this point,
it is not clear when this goal can be achieved. Pursuing these NPR recommendations will
strengthen the security of the United States and its allies and partners and bring us significant
steps closer to the President’s vision of a world without nuclear weapons.
While security arrangements including NATO will retain a nuclear dimension so long as nuclear
threats to the United States and our allies and partners remain, we will continue to seek to reduce
the role and numbers of nuclear weapons in the future. In the coming years, as U.S. and allied
non-nuclear and counter-WMD capabilities continue to improve and regional security
architectures are strengthened, and as we assess progress in restraining other threats, including inparticular biological weapons, the United States will consult with allies and partners regarding
the conditions under which it would be prudent to shift to a policy under which deterring
nuclear attack is the sole purpose of U.S. nuclear weapons.
The conditions that would ultimately permit the United States and others to give up their
nuclear weapons without risking greater international instability and insecurity are very
demanding. Among those are the resolution of regional disputes that can motivate rival states toacquire and maintain nuclear weapons, success in halting the proliferation of nuclear weapons,48
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LOOKING AHEAD: TOWARD A WORLD WITHOUT NUCLEAR WEAPONS

much greater transparency into the programs and capabilities of key countries of concern,verification methods and technologies capable of detecting violations of disarmament obligations,and enforcement measures strong and credible enough to deter such violations. Clearly, suchconditions do not exist today. But we can – and must – work actively to create those conditions.
The Administration is committed to establishing a sustainable bipartisan consensus on an agenda
for American leadership to reduce nuclear risks to ourselves, our allies and partners, and theinternational community. Together, we can take practical steps immediately and in the near term
– starting with those identified in the 2010 NPR – that not only move us toward the ultimate
goal of eliminating all nuclear weapons worldwide but can, in their own right, reinvigorate theglobal nuclear non-proliferation regime, erect higher barriers to the acquisition of nuclear
weapons and nuclear materials by terrorist groups, and strengthen U.S. and international
security.

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