Question: The first female officer to command a major Unified Combatant Command in the United States Armed Forces succeeded a Navy admiral who served as the 23rd commander of what?
Context: "Khatam-al Anbiya (Peace be upon him) Central Headquarter" (Persian: قرارگاه مرکزی خاتم‌الانبیا (ص)‎ ‎ ) is the unified combatant command headquarter of Iranian Armed Forces, under direct command of its General Staff.  The strategic headquarter is tasked to plan and coordinate joint military operations within the Iranian forces.  As of 2016, its commander is general Gholamali Rashid. Lori J. Robinson (born 1959) is a United States Air Force general who currently serves as commander of the U.S. Northern Command (USNORTHCOM) and commander of the North American Aerospace Defense Command (NORAD).  She is the first female officer to command a major Unified Combatant Command in the history of the United States Armed Forces. The United States Space Command (USSPACECOM) was a Unified Combatant Command of the United States Department of Defense, created in 1985 to help institutionalize the use of outer space by the United States Armed Forces.  The Commander in Chief of U.S. Space Command (CINCUSSPACECOM), with headquarters at Peterson Air Force Base, Colorado, also functioned as the Commander in Chief of the binational U.S.-Canadian "North American Aerospace Defense Command" (CINCNORAD), and for the majority of time during USSPACECOM's existence also as the Commander of the U.S. Air Force major command Air Force Space Command.  Military space-operations coordinated by USSPACECOM proved to be very valuable for the U.S.-led coalition in the 1991 Persian Gulf War. Air Force Special Operations Command (AFSOC), headquartered at Hurlburt Field, Florida, is the special operations component of the United States Air Force.  An Air Force major command (MAJCOM), AFSOC is also the U.S. Air Force component command to United States Special Operations Command (USSOCOM), a unified combatant command located at MacDill Air Force Base, Florida.  AFSOC provides all Air Force Special Operations Forces (SOF) for worldwide deployment and assignment to regional unified combatant commands. Air Force Space Command (AFSPC) is a major command of the United States Air Force, with its headquarters at Peterson Air Force Base, Colorado.  AFSPC supports U.S. military operations worldwide through the use of many different types of satellite, launch and cyber operations.  Operationally, AFSPC is an Air Force component command subordinate to U.S. Strategic Command (USSTRATCOM), a unified combatant command.  It is the primary space force for the U.S. Armed Forces. The United States Special Operations Command (USSOCOM or SOCOM) is the Unified Combatant Command charged with overseeing the various Special Operations Component Commands of the Army, Marine Corps, Navy, and Air Force of the United States Armed Forces.  The command is part of the Department of Defense and is the only Unified Combatant Command legislated into being by the U.S. Congress.  USSOCOM is headquartered at MacDill Air Force Base in Tampa, Florida. James Alexander "Sandy" Winnefeld Jr. (born April 24, 1956) is a retired(On Special Mission in Afghanistan).  United States Navy admiral who served as the ninth Vice Chairman of the Joint Chiefs of Staff from August 4, 2011 to July 31, 2015.  He previously served as the fourth Commander, U.S. Northern Command (USNORTHCOM) and the 21st Commander, North American Aerospace Defense Command (NORAD) from May 19, 2010 to August 3, 2011.  Prior to that, Winnefeld served as Director for Strategic Plans and Policy, The Joint Staff which he concurrently served as the Senior Member, U.S. Delegation to the U.N. Military Staff Committee.  His other operational commands include serving as the Commander, U.S. Sixth Fleet and Commander, Allied Joint Command Lisbon.  As the Vice Chairman of the Joint Chiefs of Staff, Winnefeld was the second highest-ranking officer in the United States Armed Forces, second only to the Chairman of the Joint Chiefs of Staff.  In 2015, he retired from the Navy after over 37 years of service. United States Pacific Command (USPACOM) is a unified combatant command of the United States Armed Forces responsible for the Indo-Asia-Pacific region.  It is the oldest and largest of the unified combatant commands.  Its commander, the senior U.S. military officer in the Pacific, is responsible for military operations in an area which encompasses more than 100 e6sqmi , or roughly 52 percent of the Earth’s surface, stretching from the waters off the west coast of the United States to the west coast of India, and from the Arctic to the Antarctic.  The Commander reports to the President of the United States through the Secretary of Defense and is supported by Service component and subordinate unified commands, including U.S. Army Pacific, U.S. Pacific Fleet, U.S. Pacific Air Forces, U.S. Marine Forces Pacific, U.S. Forces Japan, U.S. Forces Korea, Special Operations Command Korea, and Special Operations Command Pacific.  USPACOM also has three direct reporting units (DRUs), including Daniel K. Inouye Asia-Pacific Center for Security Studies, U.S. Pacific Command Joint Intelligence Operations Center, Center for Excellence in Disaster Management and Humanitarian Assistance; and a Standing Joint Task Force, Joint Interagency Task Force West.  The USPACOM headquarters building, the Nimitz-MacArthur Pacific Command Center, is located on Camp H.M. Smith, Hawaii. United States Joint Forces Command (USJFCOM) was a Unified Combatant Command of the United States Armed Forces.  USJFCOM was a functional command that provided specific services to the military.  The last commander was Army Gen. Ray Odierno.  As directed by the President to identify opportunities to cut costs and rebalance priorities, Defense Secretary Robert Gates recommended that USJFCOM be disestablished and its essential functions reassigned to other unified combatant commands.  Formal disestablishment occurred on August 4, 2011. William Evans "Bill" Gortney (born September 25, 1955) is a retired United States Navy admiral who most recently served as the sixth commander of U.S. Northern Command and the 23rd commander of North American Aerospace Defense Command (NORAD).  He previously served as the Commander, U.S. Fleet Forces Command from September 14, 2012 to December 2014 and Director of the Joint Staff from July 1, 2010 to August 2012.  Prior to that, he served as Commander, U.S. Naval Forces Central Command/5th Fleet.  He assumed his post as CDRUSNORTHCOM and commander of NORAD on December 5, 2014, and was succeeded by USAF General Lori Robinson on May 13, 2016.
Answer: North American Aerospace Defense Command