title: Robert McNamara

text: Up to November 1965, McNamara, who been a supporter of the war, first started to have doubts about the war, saying at a press conference that "it will be a long war", which completely contradicted his previous optimistic statements that the war would be brought to a close soon. Although he was a prime architect of the Vietnam War and repeatedly overruled the JCS on strategic matters, McNamara gradually became skeptical about whether the war could be won by deploying more troops to South Vietnam and intensifying the bombing of North Vietnam, a claim he would publish in a book years later. He also stated later that his support of the war was given out of loyalty to administration policy. He traveled to South Vietnam many times to study the situation firsthand and became increasingly reluctant to approve the large force increments requested by the military commanders.


title: Robert McNamara

text: As a Christmas gesture, Johnson ordered a bombing pause over North Vietnam and went off to his ranch in Texas for the holidays. McNamara went with his family for skiing in Colorado, but upon hearing that the president was open to extending the bombing pause for a few more days, he left his family at the sky lodge in the Rockies to fly to the Johnson ranch on 27 December 1965. McNamara knew that Johnson tended to listen to the advice of Rusk who saw extending the bombing pause as weakness, and wanted a meeting with Johnson without Rusk present. McNamara argued to the president in a three hour long meeting that the North Vietnamese would not open peace talks unless the bombing were stopped first, as they kept saying repeatedly, and persuaded Johnson to extend the bombing pause into January. At a New Year's Eve party attended by Washington's elite to welcome 1966, McNamara expressed doubts about America's ability to win the war. A week later at a dinner party attended by the economist John Kenneth Galbraith and Johnson's speechwriter Dick Goodwin, McNamara stated that victory was unobtainable, and the best that could be achieved was an "honorable withdrawal" that might save South Vietnam as a state. In February 1966, during the Honolulu conference, McNamara during an "off-the-record" chat with a group of journalists spoke about the war in very jaded terms, stating frankly that Operation Rolling Thunder was a failure. McNamara stated that North Vietnam was a backward Third World country that did not have the same advanced industrial infrastructure of First World nations, making the bombing offensive useless. McNamara concluded: "No amount of bombing can end the war". Karnow, one of the journalists present during the "off-the-record" conversation, described McNamara's personality as having changed, noting the Defense Secretary, who was normally so arrogant and self-assured, convinced he could "scientifically" solve any problem, as being subdued and clearly less self-confident.


title: Robert McNamara

text: In October 1966, McNamara returned from yet another visit to South Vietnam, full of confidence in public and doubt in private. McNamara told the media that "process has exceeded our expectations" while telling the president he saw "no reasonable way to bring the war to an end soon". Though McNamara reported to Johnson that American forces were inflicting heavy losses on the North Vietnamese and VC, he added that they could "more than replace" their losses and that "full security exists nowhere" in South Vietnam, even in areas supposedly "pacified" by the Americans. Worst of all, McNamara complained that the South Vietnamese were still not carrying their full share of the load, as they expected the Americans to do all the fighting for them, stating: "This important war must be fought and won by the Vietnamese themselves. We have known this from the beginning. But the discouraging truth is that, as was the case in 1961 and 1963 and 1965, we have not found the formula, the catalyst, for training and inspiring them into effective action".


title: Robert McNamara

text: In October 1966, he launched Project 100,000, the lowering of army IQ standards which allowed 354,000 additional men to be recruited, despite criticism that they were not suited to working in high stress or dangerous environments.


title: Robert McNamara

text: In November 1966, McNamara visited Harvard University and the car driving him to see Henry Kissinger was surrounded by anti-war protesters who forced the automobile to stop The students refused to let the car move until McNamara debated their leader, Michael Ansara, the president of the Harvard chapter of Students for a Democratic Society. McNamara agreed to the debate, and standing on the hood of his car answered the charge from a student in the crowd that the United States was waging aggression by saying the war started in 1954, not 1957, which he knew "because the International Control Commission wrote a report that said so. You haven't read it, and if you have, you obviously didn't understand it". When the student answered that he had read the International Control Commission's report and it did not say that, McNamara responded he had been a far better university student than his opponent, saying "I was tougher than you then and I'm tougher today! I was more courteous then, and I hope I'm more courteous today!". As McNamara continued to insult the crowd and the mood grew more ugly, he fled into Quincy House, from which he escaped via underground tunnels to see Kissinger. The confrontation with the students had shaken him, and it took half an hour before he was ready to address Kissinger's class.


title: Robert McNamara

text: Because the effects of Operation Rolling Thunder were more easily measured than with the ground war, McNamara was especially troubled by the revelation that the bombing offensive had not caused the collapse of North Vietnam's economy as predicted. In June 1967, American bombers hit North Vietnam's hydroelectric plants and reduced North Vietnam capacity to generate electricity by 85%, according to McNamara's calculations. At the same time, he also calculated that the annual amount of electricity generated in North Vietnam was equal only to a fifth of the electricity generated every year at the Potomac Electric Power Company's plant in Alexandria, Virginia, making the destruction of North Vietnamese power plants meaningless to the outcome of the war as the amount of electricity generated was so small. He also calculated in 1967 that over the last two years, American bombers had inflicted damage on North Vietnam equal to about $300 million while at the same time, Rolling Thunder had cost the U.S. Air Force about 700 aircraft shot down over North Vietnam whose total value was about $900 million, making the bombing campaign uneconomical. McNamara's doubts were encouraged by his civilian aides such as Leslie H. Gelb and John McNaughton, who complained that their wives and teenage children were chiding them as "war criminals" when they came home from work. McNamara's own teenage son, Robert Craig McNamara, was opposed to the war and denounced his father when he came from work every day. McNamara was shocked to discover that the American flag was hanging upside down in his son's bedroom as the younger McNamara told him that he was ashamed of America because of him. McNaughton told McNamara that after having talked to some of the young people that "a feeling is widely and strongly held...that 'the Establishment' is out of its mind" and the dominant opinion was "that we are trying to impose some U.S. image on distant peoples we cannot understand and that we carrying the thing to absurd lengths."


title: Robert McNamara

text: In a memo of 19 May 1967 to the president, McNamara stated the military side of the war was going well with the Americans killing thousands of the enemy every month, but the political side was not, as South Vietnam remained as dysfunctional as ever. He wrote: "Corruption is widespread. Real government control is confined to enclaves. There is rot in the fabric". McNamara wrote that the idea that the American forces would temporarily stabilize the situation so the South Vietnamese could take over the war themselves was flawed as the dysfunctional South Vietnamese state would never be able to win the war, thus meaning the Americans would have to stay in Vietnam for decades to come. He advised Johnson not to accept Westmoreland's call for an additional 200,000 soldiers as that would mean calling up the Reserves, which in turn would require a wartime economy. The economic sacrifices that ending the peacetime economy would entail would make it almost politically impossible to negotiate peace, and in effect would mean placing the hawks in charge, which was why those of a hawkish inclination kept pressing for the Reserves to be called up. The economic sacrifices could only be justified to the American people by saying the war would be brought to a victorious conclusion. McNamara rejected the advice of the hawks, warning that steps such as bombing North Vietnam's dikes and locks to flood the farmland with the aim of causing a famine; mining the coast of North Vietnam to sink Soviet ships bringing in arms; invading Laos and Cambodia; and finally in the last resort using nuclear weapons if the other measures failed were likely to alienate world opinion and increase domestic opposition. McNamara wrote: "The picture of the world's greatest superpower killing or seriously injuring 1,000 noncombatants a week, while trying to pound a tiny backward nation into submission on an issue whose merits are hotly disputed, is not a pretty one". Finally, McNamara dismissed the Domino Theory as irrelevant since General Suharto had seized power in Indonesia in 1965 and proceeded to wipe out the Indonesian Communist Party, the third-largest in the world, killing hundreds of thousands of Indonesian Communists. He argued that with Suharto in power in Indonesia that "the trend in Asia was now running in America's favor, which reduced the importance of South Vietnam". To the Americans, Indonesia was the most important of all the "dominoes" in Southeast Asia, and McNamara argued that even if the South Vietnamese "domino" were to fall, the Indonesian "domino" would still stand.


title: Robert McNamara

text: McNamara commissioned the Vietnam Study Task Force on June 17, 1967. He was inspired by the confrontation at Harvard the previous November as he had discovered that the students he had been debating knew more about Vietnam's history than he did. The task was assigned to Gelb and six officials who were instructed by McNamara to examine just how and why the United States became involved in Vietnam, starting with American relations with the Viet Minh in World War Two. Though Gelb was a hawk who had written pro-war speeches for the Republican Senator Jacob Javits, he and his team became disillusioned as they wrote the history; at one point when discussing what were the lessons of Vietnam, Paul Gorman, one of the historians went up to the blackboard to write simply, "Don't." By April 1969, "The Report of the Office of the Secretary of Defense Vietnam Task Force", as the Pentagon Papers were officially titled, was finished, but widely ignored within the government. Intended as the official record of US military involvement in Indochina, the final report ran to 3,000 pages and was classified as "Top Secret – Sensitive." The report was ultimately leaked in 1971 to the "New York Times" by Daniel Ellsberg, a former aide to McNamara's Assistant Secretary of Defense, John McNaughton. The leak became known as the Pentagon Papers, revealing that McNamara and others had been aware that the Vietnam offensive was futile. Subsequent efforts by the Nixon administration to prevent such leaks led indirectly to the Watergate scandal. In an interview, McNamara said that the Domino Theory was the main reason for entering the Vietnam War. He also stated, "Kennedy hadn't said before he died whether, faced with the loss of Vietnam, he would [completely] withdraw; but I believe today that had he faced that choice, he would have withdrawn."


title: Robert McNamara

text: To commemorate President Harry S Truman's signing an order to end segregation in the military, McNamara issued Directive 5120.36 on July 26, 1963. This directive, "Equal Opportunity in the Armed Forces", dealt directly with the issue of racial and gender discrimination in areas surrounding military communities. The directive declared, "Every military commander has the responsibility to oppose discriminatory practices affecting his men and their dependents and to foster equal opportunity for them, not only in areas under his immediate control, but also in nearby communities where they may live or gather in off-duty hours." (para. II.C.) Under the directive, commanding officers were obligated to use the economic power of the military to influence local businesses in their treatment of minorities and women. With the approval of the Secretary of Defense, the commanding officer could declare areas off-limits to military personnel for discriminatory practices.


title: Robert McNamara

text: In July 1961, McNamara was informed by the British Defense Minister, Peter Thorneycroft, that the financial burden of trying to maintain British forces around the world was too much, and that the British Prime Minister Harold Macmillan was considering a withdrawal of all British forces "East of Suez" to end the British military presence in Asia. McNamara was opposed to this and the U.S. Navy began lobby for Britain to allow an American naval base to be set up in the Indian Ocean. This was endorsed in a Joint Chiefs of Staff memo in January 1962 which expressed concern with the rise nationalist movements in British colonies which could seek the withdrawal of American forces.


title: Robert McNamara

text: In September 1962, Thorneycroft visited Washington to meet McNamara and to begin talks about which British island in the Indian Ocean was to have the American base. By 1963, the Americans had selected the island of Diego Garcia in the Chagos Archipelago, which was part of the British Crown colony of Mauritius as the ideal place for a and naval bases. McNamara offered to have the United States pay $15 million U.S. dollars annually in rent to the British government for a base in Diego Garcia, a sum that was agreeable to London. In 1965, the Chagos islands were severed from the Mauritius and turned into the British Indian Ocean Territory as the prelude for the projected American base.


title: Robert McNamara

text: In 1966, in a meeting with Defense Minister Denis Healey, McNamara pressed for the British to remain in Asia, saying he wanted them to keep their base in Singapore. Healey offered evasive answers, claiming that his government wanted to keep the Singapore base, but their financial costs was draining the British exchequer. In July 1966, McNamara told Johnson that it was "absolutely essential" for the British to remain "East of Suez", citing political rather military reasons, namely that it showed the importance of the region, which thus justified the America's involvement in Vietnam. To placate the Americans, the British were willing to offer a lease on Diego Garcia on almost any terms favorable to the Americans. The Americans informed the British that they wanted all of the Chagossians expelled from the island, a request that the British agreed. In January 1968, Wilson announced that with the exception of Hong Kong, all British forces would be withdrawn "East of Suez" in order to save money. Starting in 1968, the British bagan expelling the Chagossians from Diego Garcia with the process completed by 1973.


title: Robert McNamara

text: Toward the end of his term McNamara also opposed an anti-ballistic missile (ABM) system proposed for installation in the U.S. in defense against Soviet missiles, arguing the $40 billion "in itself is not the problem; the penetrability of the proposed shield is the problem." Under pressure to proceed with the ABM program after it became clear that the Soviets had begun a similar project, McNamara finally agreed to a "light" system which he believed could protect against the far smaller number of Chinese missiles. However, he never believed it was wise for the United States to move in that direction because of psychological risks of relying too much on nuclear weaponry and that there would be pressure from many directions to build a larger system than would be militarily effective.


title: Robert McNamara

text: He always believed that the best defense strategy for the U.S. was a parity of mutually assured destruction with the Soviet Union. An ABM system would be an ineffective weapon as compared to an increase in deployed nuclear missile capacity.


title: Robert McNamara

text: McNamara wrote of his close personal friendship with Jackie Kennedy and how she demanded that he stop the killing in Vietnam. As McNamara grew more and more controversial after 1966 and his differences with the President and the Joint Chiefs of Staff over Vietnam strategy became the subject of public speculation, frequent rumors surfaced that he would leave office. By 1967, McNamara was suffering visibly from the nervous strain as he went days without shaving and he suffered spasms where his jaw would quiver uncontrollably for hours. Johnson said about him: "You know, he's a fine man, a wonderful man, Bob McNamara. He has given everything, just about everything, and, you know, we just can't afford another Forrestal" (a reference to the first Defense Secretary, James Forrestal, who committed suicide due to work-related stress and depression).


title: Robert McNamara

text: Senator John C. Stennis was a conservative Southern Democrat who enjoyed much influence as a senior member of the Senate Armed Forces Committee. Stennis saw himself more as a champion of the military rather than its overseer, and as such the military often leaked information to him, in the full knowledge that he would take up their cause on Capitol Hill. Reflecting their unhappiness with McNamara's leadership, in the spring of 1967 senior generals and admirals let Stennis know of their belief that the Defense Secretary was mismanaging the war. This led Stennis to schedule hearings for the Senate Armed Forces Committee in August 1967 to examine the charge that "unskilled civilian amateurs" (i.e. McNamara) were not letting "professional military experts" win the war. He charged that McNamara had placed too many restrictions on bombing North Vietnam to protect innocent North Vietnamese civilians. The chairman of the Senate Armed Forces Committee, Senator Richard Russell Jr., was opposed to the war, but he expressed his opposition in the most cautious and lukewarm terms as he did not wish to appear unpatriotic, and so the hawkish Stennis enjoyed more power than his title of deputy chairman of the committee would suggest.


title: Robert McNamara

text: The hearings opened on 8 August 1967, and Stennis called as his witnesses numerous admirals and Air Force generals who all testified to their belief that the United States was fighting with "one arm tied behind its back", implicitly criticizing McNamara's leadership. They complained of "overtly restrictive controls" in bombing North Vietnam that they claimed were preventing them from winning the war. When McNamara himself appeared as a witness before the Senate Armed Forces Committee on 25 August 1967, he defended the war in very lukewarm terms that strongly suggested he had lost faith in the war, testifying that the bombing campaign against North Vietnam was ineffective, making the question of the bombing restrictions meaningless. McNamara described all of the 57 restricted targets as either of no importance such as a tire factory in Hanoi that produced only 30 tires per day or carried too much risk of hitting Soviet ships bringing supplies to North Vietnam. He warned that the prospect of American bombers damaging or sinking Soviet merchantmen while wounding or killing Soviet sailors carried too much risk of causing World War Three. McNamara testified that the bombing campaign had failed to reduce the supplies coming down the Ho Chi Minh Trail as the Viet Cong needed only 15 tons of supplies per day to continue to fight and "even if the quantity were five times that amount, it could be transported by only a few trucks". McNamara went on to say that the bombing raids had not damaged the North Vietnamese economy which was "agrarian and simple" and the North Vietnamese people were unfamiliar with "the modern comforts and conveniences that most of us in the Western world take for granted". McNamara also stated that North Vietnamese morale was not broken by the bombing offensive as the North Vietnamese people were "accustomed to discipline and are no strangers to deprivation and death" while everything indicated the leadership in Hanoi were not affected by the bombing raids. Thus, he lacked "any confidence that they can be bombed to the negotiating table". McNamara concluded that only some sort of genocide could actually win the war, stating: "Enemy operations in the south cannot, on the basis of any reports I have seen be stopped by air bombardment-short, that is, of the virtual annihilation of North Vietnam and its people".


title: Robert McNamara

text: Besides Stennis, the other members of the Senate Armed Forces Committee were senators Henry M. Jackson, Strom Thurmond and Stuart Symington, all of whom were very hostile to McNamara in their questioning of him. Senator Thurmond reproached McNamara: "I think it is a statement of placating the Communists. It is a statement of appeasing the Communists. It is a statement of no-win". Privately, McNamara felt that Thurmond was an "ass", saying he was a bigoted, ignorant Southern politician whose only values were a mindless militarism, a fervent belief in white supremacy and a fondness for marrying women far younger than himself. McNamara felt that it was beneath him to be questioned by Thurmond, which explained why he was notably truculent in his answers to him.


title: Robert McNamara

text: Stennis wrote the committee's report which accused McNamara of having "consistently overruled the unanimous recommendations of military commanders and the joint chiefs of staff", whom Stennis wrote had proposed "systematic, timely and hard-hitting actions". Stennis damned McNamara for putting in bombing restrictions to protect North Vietnamese civilians and claimed that the war could be easily won if only McNamara would just obey all of the advice he received from the military. Stennis was not influenced by the hearings as he had written the committee's report before the hearings had even began. Johnson saw the hearings as proof that it was time to dismiss McNamara, whom he believed was "cracking up" under the strain of the war, as reflected in the Defense Secretary's criticism of the Rolling Thunder bombings. Stennis, an ardent white supremacist who had fiercely opposed Johnson's civil rights legislation, was an old enemy of Johnson's, which led the president to decide not to sack McNamara in August 1967 as that would be seen as a victory by Stennis, and instead to wait a few months to fire him. In an interview with his biographer, Doris Kearns Goodwin, Johnson stated that McNamara was "cracking up" as the pressures of the war were too much for him, and so he decided to fire him as it would have been "a damn unfair thing to force him to stay". Johnson had long resented and hated the Kennedy brothers, whom he thought looked down upon him as "white trash" from Texas. Senator Robert F. Kennedy had emerged as a leading critic of the war by 1967, and Johnson stated to Kearns his belief that McNamara had suffered a nervous breakdown, of which Kennedy, a close friend of McNamara, had taken advantage of. Johnson told Kearns: "Every day, Bobby [Kennedy] would call up McNamara telling him that the war was terrible and immoral, and that he had to leave". To soften the blow, Johnson claimed to Kearns that he had talked it over with McNamara and had decided to offer him the presidency of the World Bank, "the only job he really wanted then". Johnson had chosen the job of World Bank president for McNamara because its rules prohibited the president from involving himself in the domestic affairs of member nations, which would prevent McNamara from criticizing the war after he left office. Johnson's biggest fear was that if he fired McNamara, then he might join with Kennedy in criticizing him and the war; given his status as the longest-serving Defense Secretary, such criticism would be especially damaging.


title: Robert McNamara

text: When a reporter asked McNamara if the Stennis hearings indicated a rift between him and the Joint Chiefs of Staff, McNamara replied: "My polices don't differ with those of the Joint Chiefs and I think they would be the first to say it". General Earle "Bus" Wheeler, the Chairman of the Joint Chiefs of Staff had become dissatisfied with McNamara's leadership and was outraged by that remark. In response to McNamara's claim that the Joint Chiefs supported him, he proposed that the Joint Chiefs all resign in protest at McNamara's leadership. General Harold K. Johnson of the Army, who erroneously blamed McNamara for Johnson's decision not to call up the Reserves in 1965, agreed to Wheeler's plan with his only regret being that he did not resign in 1965. The plan collapsed when General Wallace M. Greene of the Marine Corps refused to go along with it.


title: Robert McNamara

text: On 21 October 1967, McNamara saw the March on the Pentagon anti-war protest from his office in the Pentagon. He witnessed hippie girls placing flowers in the guns of the D.C National Guardsman standing in front of the Pentagon. McNamara described the scene as "hellish" as the hippie girls bared their breasts to tempt the Guardsman to "make love, not war" while other hippies spat in the faces of the Guardsmen. However, despite seeing the March on the Pentagon demonstrators as a sign of social decay, his characteristic competitive spirit came to the fore as he argued that if he had been leading the March on the Pentagon, he would have taken over the Pentagon and shut it down, saying hippies lacked the necessary discipline and intelligence. On 31 October 1967, McNamara wrote Johnson a memo which he sent the next day saying that the war could not be continued as it "would be dangerous, costly in lives and unsatisfactory to the American people". Johnson wrote on the margins on the memo remarks such as "How do we get this conclusion?" and "Why believe this?"


title: Robert McNamara

text: In an early November 1967 memorandum to Johnson, McNamara's recommendation to freeze troop levels, stop bombing North Vietnam and for the U.S. to hand over ground fighting to South Vietnam was rejected outright by the President. McNamara's recommendations amounted to his saying that the strategy of the United States in Vietnam which had been pursued to date had failed. McNamara later stated he "never heard back" from Johnson regarding the memo. Largely as a result, on November 29 of that year, McNamara announced his pending resignation and that he would become President of the World Bank. Other factors were the increasing intensity of the anti-war movement in the U.S., the approaching presidential campaign in which Johnson was expected to seek re-election, and McNamara's support—over the objections of the Joint Chiefs of Staff, of construction along the 17th parallel separating South and North Vietnam of a line of fortifications running from the coast of Vietnam into Laos. The President's announcement of McNamara's move to the World Bank stressed his stated interest in the job and that he deserved a change after seven years as Secretary of Defense (longer than any of his predecessors or successors).


title: Robert McNamara

text: Others give a different view of McNamara's departure from office. For example, Stanley Karnow in his book "Vietnam: A History" strongly suggests that McNamara was asked to leave by the President. The historian Arthur Schlesinger, Jr stated that he was present during a conversation between McNamara and Senator Kennedy during which the former told the latter that he only learned from reading the newspapers of Johnson's announcement that he had just "resigned" as Defense Secretary and had been appointed president of the World Bank. McNamara himself expressed uncertainty about the question. On 17 November 1967, a story in the "Financial Times" of London based on leaked sources in Washington stated McNamara was going to be the next World Bank president, which came as a considerable surprise to McNamara. Afterwards, McNamara met with Kennedy who told him to resign in protest and denounce the war as unwinnable, counsel that McNamara rejected, saying that Johnson had been a friend and that he was still loyal to him. When McNamara refused to resign, Kennedy told him that he should turn down the World Bank presidency and join him in criticizing the war, which McNamara refused to do. Johnson knew that McNamara was concerned about poverty in the Third World, and that the possibility of serving as World Bank president would be too tempting for McNamara to resist.


title: Robert McNamara

text: McNamara left office on February 29, 1968; for his efforts, the President awarded him both the Medal of Freedom and the Distinguished Service Medal. McNamara's last day as Defense Secretary was a memorable one. The hawkish National Security Adviser, Walt Whitman Rostow, argued at a cabinet meeting that day that the United States was on the verge of winning the war. Rostow urged Johnson to send 206,000 more American troops to South Vietnam to join the half-million already there and to drastically increase the number of bombing raids on North Vietnam. At that point, McNamara snapped in fury at Rostow, saying: "What then? This goddamned bombing campaign, it's worth nothing, it's done nothing, they dropped more bombs than on all of Europe in all of World War II and it hasn't done a fucking thing!" McNamara then broke down in tears, saying to Johnson to just accept that the war could not be won and stop listening to Rostow. Henry McPherson, an aide to the president, recalled the scene: "He reeled off the familiar statistics-how we had dropped more bombs on Vietnam than on all of Europe during World War II. Then his voice broke, and there were tears on his eyes as he spoke of the futility, the crushing futility of the air war. The rest of us sat silently-I for one with my mouth open, listening to the secretary of defense talk that way about a campaign for which he had, ultimately, been responsible. I was pretty shocked".


title: Robert McNamara

text: Shortly after McNamara departed the Pentagon, he published "The Essence of Security", discussing various aspects of his tenure and position on basic national security issues. He did not speak out again on defense issues or Vietnam until after he left the World Bank.


title: Robert McNamara

text: Robert McNamara served as head of the World Bank from April 1968 to June 1981, when he turned 65. In March 1968, McNamara's friend Senator Robert Kennedy entered the Democratic primaries with aim of challenging Johnson. Kennedy asked McNamara to tape a statement praising his leadership during the Cuban Missile Crisis with the understanding that the statement was meant for a TV ad. McNamara praised Kennedy's "shrewd diplomacy", saying he had "remained calm and cool, firm, but restrained, never nettled and never rattled". Though this was a violation of World Bank rules, McNamara felt guilty over refusing Kennedy's requests to resign and decline the World Bank presidency. He was attacked for the tape with the "New York Times" in an editorial lambasting him for his "poor judgement and poorer taste". For a moment, McNamara feared he would be fired from the World Bank.


title: Robert McNamara

text: A safe was installed in McNamara's office at the World Bank to house his papers relating to his time as Defense Secretary, which was a normal courtesy extended to former Defense Secretaries who might face controversy over their actions and wish to defend themselves by quoting from the documentary record. When the Pentagon Papers were finished in April 1969, and a copy of the Papers were brought into McNamara's office, he became angry and said: "I don't want to see it! Take it back!" By 1969, McNamara wanted to forget the Vietnam war and did not want any reminders of his former job.


title: Robert McNamara

text: In his 13 years at the Bank, he introduced key changes, most notably, shifting the Bank's economic development policies toward targeted poverty reduction. Prior to his tenure at the World Bank, poverty did not receive substantial attention as part of international and national economic development; the focus of development had been on industrialization and infrastructure. Poverty also came to be redefined as a condition faced by people rather than countries. According to Martha Finnemore, the World Bank under McNamara's tenure "sold" states poverty reduction "through a mixture of persuasion and coercion." McNamara negotiated, with the conflicting countries represented on the Board, a growth in funds to channel credits for development, in the form of health, food, and education projects. He also instituted new methods of evaluating the effectiveness of funded projects. One notable project started during McNamara's tenure was the effort to prevent river blindness.


title: Robert McNamara

text: In 1972, McNamara visited Santiago to meet President Salvador Allende to discuss the latter's policy of nationalization, especially of the copper mining companies. McNamara's son, Craig McNamara was living in Chile at the time, but the two did not meet owing to the rift over the Vietnam war. McNamara "fils" stated in 1984: "I think my father truly respected Allende-his compassion, his humility. But he disapproved of the nationalizations". The meeting with Allende concluded with McNamara ending all World Bank loans to Chile. On 11 September 1973, Allende was overthrown in a coup d'etat led by General Augusto Pinochet. In 1974, McNamara visited Santiago to meet Pinochet and agreed to the World Bank resuming loans to Chile. Craig McNamara, who was visiting the United States at the time of the coup and chose not to return to Chile was outraged by the decision to resume the loans, telling his father in a phone call: "You can't do this-you always say the World Bank is not a political institution, but financing Pinochet clearly would be". McNamara "pere" flatly stated in reply: "It's too late. I've already made my decision". McNamara "fils" feels that his father's claim that he had to cease loans to Chile because the Allende government's nationalization policy was an "economic" matter that fell within the purview of the World Bank, but human rights abuses under Pinochet were a "political" matter that was outside of the World Bank's purview was disingenuous and dishonest. Craig McNamara stated: "I was really upset by that. That was hard to mend".


title: Robert McNamara

text: As World Bank President, he declared at the 1968 Annual Meeting of the International Monetary Fund and the World Bank Group that countries permitting birth control practices would get preferential access to resources. During the emergency in India, McNamara remarked "At long last, India is moving to effectively address its population problem," regarding the forced sterilization.


title: Robert McNamara

text: From 1981 to 1984, McNamara served on the Board of Trustees at American University in Washington, D.C.


title: Robert McNamara

text: In 1982, McNamara joined several other former national security officials in urging that the United States pledge to not use nuclear weapons first in Europe in the event of hostilities; subsequently he proposed the elimination of nuclear weapons as an element of NATO's defense posture.


title: Robert McNamara

text: In 1993, Washington journalist Deborah Shapley published a 615-page biography of Robert McNamara titled "Promise and Power: The Life and Times of Robert McNamara". Shapley concluded her book with these words: "For better and worse McNamara shaped much in today's world—and imprisoned himself. A little-known nineteenth century writer, F.W. Boreham, offers a summation: 'We make our decisions. And then our decisions turn around and make us.'"


title: Robert McNamara

text: McNamara's memoir, "In Retrospect: The Tragedy and Lessons of Vietnam", published in 1995, presented an account and analysis of the Vietnam War from his point of view. According to his lengthy "New York Times" obituary, "[h]e concluded well before leaving the Pentagon that the war was futile, but he did not share that insight with the public until late in life. In 1995, he took a stand against his own conduct of the war, confessing in a memoir that it was 'wrong, terribly wrong'." In return, he faced a "firestorm of scorn" at that time. In November 1995, McNamara returned to Vietnam, this time visiting Hanoi. Despite his role as one of the architects of Operation Rolling Thunder, McNamara met with a surprisingly warm reception, even from those who survived the bombing raids, and was often asked to autograph pirate editions of "In Retrospect" which had been illegally translated and published in Vietnam. During his visit, McNamara met his opposite number during the war, General Võ Nguyên Giáp who served as North Vietnam's Defense Minister. The American historian Charles Neu who was present at the McNamara-Giáp meeting observed the differences in the style of the two men with McNamara repeatedly interrupting Giáp to ask questions, usually related to something numerical, while Giáp gave a long leisurely monologue, quoting various Vietnamese cultural figures such as poets, that began with Vietnamese revolts against China during the years 111 BC–938 AD when Vietnam was a Chinese province. Neu wrote his impression was that McNamara was a figure who thought in the short term while Giáp thought in the long term.


title: Robert McNamara

text: "The Fog of War: Eleven Lessons from the Life of Robert S. McNamara" is a 2003 Errol Morris documentary consisting mostly of interviews with Robert McNamara and archival footage. It went on to win the Academy Award for Documentary Feature. The particular structure of this personal account is accomplished with the characteristics of an intimate dialogue. As McNamara explains, it is a process of examining the experiences of his long and controversial period as the United States Secretary of Defense, as well as other periods of his personal and public life.


title: Robert McNamara

text: McNamara maintained his involvement in politics in his later years, delivering statements critical of the Bush administration's 2003 invasion of Iraq. On January 5, 2006, McNamara and most living former Secretaries of Defense and Secretaries of State met briefly at the White House with President Bush to discuss the war.


title: Robert McNamara

text: McNamara married Margaret Craig, his teenage sweetheart, on August 13, 1940. She was an accomplished cook, and Robert's favorite dish was reputed to be her beef bourguignon. Margaret McNamara, a former teacher, used her position as a Cabinet spouse to launch a reading program for young children, Reading Is Fundamental, which became the largest literacy program in the country. She died of cancer in 1981. Later that summer, her ashes were scattered by her family on a mountainside meadow at Buckskin Pass, near Snowmass Village, Colorado.


title: Robert McNamara

text: The couple had two daughters and a son. The son Robert Craig McNamara, who as a student objected to the Vietnam War, is now a walnut and grape farmer in California. He is the owner of Sierra Orchards in Winters, California. Daughter Kathleen McNamara Spears is a forester with the World Bank. The second daughter is Margaret Elizabeth Pastor.


title: Robert McNamara

text: In the Errol Morris documentary, McNamara reports that both he and his wife were stricken with polio shortly after the end of World War II. Although McNamara had a relatively short stay in the hospital, his wife's case was more serious and it was concern over meeting her medical bills that led to his decision to not return to Harvard but to enter private industry as a consultant at Ford Motor Company.


title: Robert McNamara

text: When working at Ford Motor Company, McNamara resided in Ann Arbor, Michigan, rather than the usual auto executive domains of Grosse Pointe, Birmingham, and Bloomfield Hills. He and his wife sought to remain connected with a university town (the University of Michigan) after their hopes of returning to Harvard after the war were put on hold.


title: Robert McNamara

text: On September 29, 1972, a passenger on the ferry to Martha's Vineyard recognized McNamara on board and attempted to throw him into the ocean. McNamara declined to press charges. The man remained anonymous but was interviewed years later by author Paul Hendrickson, who quoted the attacker as saying, "I just wanted to confront (McNamara) on Vietnam."


title: Robert McNamara

text: After his wife's death, McNamara dated Katharine Graham, with whom he had been friends since the early 1960s. Graham died in 2001.


title: Robert McNamara

text: In September 2004, McNamara wed Diana Masieri Byfield, an Italian-born widow who had lived in the United States for more than 40 years. It was her second marriage. She was married to Ernest Byfield, a former OSS officer and Chicago hotel owner, thirty years her senior, whose first wife, Gladys Rosenthal Tartiere, leased her 400-acre (1.6 km²) Glen Ora estate in Middleburg, Virginia, to John F. Kennedy during his presidency.


title: Robert McNamara

text: At the end of his life McNamara was a life trustee on the Board of Trustees of the California Institute of Technology (Caltech), a trustee of the Economists for Peace and Security, a trustee of the American University of Nigeria, and an honorary trustee for the Brookings Institution.


title: Robert McNamara

text: McNamara died at his home in Washington, D.C., at 5:30 am on July 6, 2009, at the age of 93. He is buried at the Arlington National Cemetery in Arlington, Virginia, with the grave marker also commemorating his wives.


title: Robert McNamara

text: McNamara's papers from his years as Secretary of Defense are housed in the John F. Kennedy Presidential Library and Museum in Boston, Massachusetts.


title: BitTorrent

text: BitTorrent is a communication protocol for peer-to-peer file sharing (P2P), which enables users to distribute data and electronic files over the Internet in a decentralized manner.


title: BitTorrent

text: To send or receive files, users use a BitTorrent client on their Internet-connected computer. A BitTorrent client is a computer program that implements the BitTorrent protocol. BitTorrent clients are available for a variety of computing platforms and operating systems, including an official client released by Rainberry, Inc. Popular clients include μTorrent, Xunlei Thunder, Transmission, qBittorrent, Vuze, Deluge, BitComet and Tixati. BitTorrent trackers provide a list of files available for transfer and allow the client to find peer users, known as "seeds", who may transfer the files.


title: BitTorrent

text: Programmer Bram Cohen designed the protocol in April 2001, and released the first available version on 2 July 2001. On 15 May 2017, BitTorrent, Inc. (later renamed Rainberry, Inc.) released BitTorrent v2 protocol specification. libtorrent was updated to support the new version on 6 September 2020.


title: BitTorrent

text: BitTorrent is one of the most common protocols for transferring large files, such as digital video files containing TV shows and video clips, or digital audio files containing songs. BitTorrent was responsible for 3.35% of all worldwide bandwidth—more than half of the 6% of total bandwidth dedicated to file sharing. In 2019, BitTorrent was a dominant file sharing protocol and generated a substantial amount of Internet traffic, with 2.46% of downstream, and 27.58% of upstream traffic. , BitTorrent had 15–27 million concurrent users at any time. , BitTorrent is utilized by 150 million active users. Based on this figure, the total number of monthly users may be estimated to more than a quarter of a billion (≈ 250 million).


title: BitTorrent

text: The use of BitTorrent may sometimes be limited by Internet Service Providers (ISPs), on legal or copyright grounds. Users may choose to run seedboxes or virtual private networks (VPNs) to circumvent these restrictions.


title: BitTorrent

text: Programmer Bram Cohen, a University at Buffalo alumnus, designed the protocol in April 2001, and released the first available version on 2 July 2001.


title: BitTorrent

text: The first release of the BitTorrent client had no search engine and no peer exchange. Up until 2005, the only way to share files was by creating a small text file called a "torrent", that they would upload to a torrent index site. The first uploader acted as a "seed", and downloaders would initially connect as "peers". Those who wish to download the file would download the torrent, which their client would use to connect to a tracker which had a list of the IP addresses of other seeds and peers in the swarm. Once a peer completed a download of the complete file, it could in turn function as a seed. These files contain metadata about the files to be shared and the trackers which keep track of the other seeds and peers.


title: BitTorrent

text: In 2005, first Vuze and then the BitTorrent client introduced distributed tracking using distributed hash tables which allowed clients to exchange data on swarms directly without the need for a torrent file.


title: BitTorrent

text: In 2006, peer exchange functionality was added allowing clients to add peers based on the data found on connected nodes.


title: BitTorrent

text: BitTorrent v2 is intended to work seamlessly with previous versions of the BitTorrent protocol. The main reason for the update was that the old cryptographic hash function, SHA-1 is no longer considered safe from malicious attacks by the developers, and as such, v2 uses SHA-256. To ensure backwards compatibility, the v2 .torrent file format supports a hybrid mode where the torrents are hashed through both the new method and the old method, with the intent that the files will be shared with peers on both v1 and v2 swarms. Another update to the specification is adding a hash tree to speed up time from adding a torrent to downloading files, and to allow more granular checks for file corruption. In addition, each file is now hashed individually, enabling files in the swarm to be deduplicated, so that if multiple torrents include the same files, but seeders are only seeding the file from some, downloaders of the other torrents can still download the file. Magnet links for v2 also support a hybrid mode to ensure support for legacy clients.


title: BitTorrent

text: The BitTorrent protocol can be used to reduce the server and network impact of distributing large files. Rather than downloading a file from a single source server, the BitTorrent protocol allows users to join a "swarm" of hosts to upload and download from each other simultaneously. The protocol is an alternative to the older single source, multiple mirror sources technique for distributing data, and can work effectively over networks with lower bandwidth. Using the BitTorrent protocol, several basic computers, such as home computers, can replace large servers while efficiently distributing files to many recipients. This lower bandwidth usage also helps prevent large spikes in internet traffic in a given area, keeping internet speeds higher for all users in general, regardless of whether or not they use the BitTorrent protocol.


title: BitTorrent

text: The file being distributed is divided into segments called "pieces". As each peer receives a new piece of the file, it becomes a source (of that piece) for other peers, relieving the original seed from having to send that piece to every computer or user wishing a copy. With BitTorrent, the task of distributing the file is shared by those who want it; it is entirely possible for the seed to send only a single copy of the file itself and eventually distribute to an unlimited number of peers. Each piece is protected by a cryptographic hash contained in the torrent descriptor. This ensures that any modification of the piece can be reliably detected, and thus prevents both accidental and malicious modifications of any of the pieces received at other nodes. If a node starts with an authentic copy of the torrent descriptor, it can verify the authenticity of the entire file it receives.


title: BitTorrent

text: Pieces are typically downloaded non-sequentially, and are rearranged into the correct order by the BitTorrent client, which monitors which pieces it needs, and which pieces it has and can upload to other peers. Pieces are of the same size throughout a single download (for example, a 10 MB file may be transmitted as ten 1 MB pieces or as forty 256 KB pieces).


title: BitTorrent

text: Due to the nature of this approach, the download of any file can be halted at any time and be resumed at a later date, without the loss of previously downloaded information, which in turn makes BitTorrent particularly useful in the transfer of larger files. This also enables the client to seek out readily available pieces and download them immediately, rather than halting the download and waiting for the next (and possibly unavailable) piece in line, which typically reduces the overall time of the download. This eventual transition from peers to seeders determines the overall "health" of the file (as determined by the number of times a file is available in its complete form).


title: BitTorrent

text: The distributed nature of BitTorrent can lead to a flood-like spreading of a file throughout many peer computer nodes. As more peers join the swarm, the likelihood of a successful download by any particular node increases. Relative to traditional Internet distribution schemes, this permits a significant reduction in the original distributor's hardware and bandwidth resource costs. Distributed downloading protocols in general provide redundancy against system problems, reduce dependence on the original distributor, and provide sources for the file which are generally transient and therefore there is no single point of failure as in one way server-client transfers.


title: BitTorrent

text: Though both ultimately transfer files over a network, a BitTorrent download differs from a one way server-client download (as is typical with an HTTP or FTP request, for example) in several fundamental ways:


title: BitTorrent

text: Taken together, these differences allow BitTorrent to achieve much lower cost to the content provider, much higher redundancy, and much greater resistance to abuse or to "flash crowds" than regular server software. However, this protection, theoretically, comes at a cost: downloads can take time to rise to full speed because it may take time for enough peer connections to be established, and it may take time for a node to receive sufficient data to become an effective uploader. This contrasts with regular downloads (such as from an HTTP server, for example) that, while more vulnerable to overload and abuse, rise to full speed very quickly, and maintain this speed throughout. In the beginning, BitTorrent's non-contiguous download methods made it harder to support "streaming playback". In 2014, the client Popcorn Time allowed for streaming of BitTorrent video files. Since then, more and more clients are offering streaming options.


title: BitTorrent

text: The BitTorrent protocol provides no way to index torrent files. As a result, a comparatively small number of websites have hosted a large majority of torrents, many linking to copyrighted works without the authorization of copyright holders, rendering those sites especially vulnerable to lawsuits. A BitTorrent index is a "list of .torrent files, which typically includes descriptions" and information about the torrent's content. Several types of websites support the discovery and distribution of data on the BitTorrent network. Public torrent-hosting sites such as The Pirate Bay allow users to search and download from their collection of torrent files. Users can typically also upload torrent files for content they wish to distribute. Often, these sites also run BitTorrent trackers for their hosted torrent files, but these two functions are not mutually dependent: a torrent file could be hosted on one site and tracked by another unrelated site. Private host/tracker sites operate like public ones except that they may restrict access to registered users and may also keep track of the amount of data each user uploads and downloads, in an attempt to reduce "leeching".


title: BitTorrent

text: Web search engines allow the discovery of torrent files that are hosted and tracked on other sites; examples include The Pirate Bay and BTDigg. These sites allow the user to ask for content meeting specific criteria (such as containing a given word or phrase) and retrieve a list of links to torrent files matching those criteria. This list can often be sorted with respect to several criteria, relevance (seeders-leechers ratio) being one of the most popular and useful (due to the way the protocol behaves, the download bandwidth achievable is very sensitive to this value). Metasearch engines allow one to search several BitTorrent indices and search engines at once.


title: BitTorrent

text: The Tribler BitTorrent client was among the first to incorporate built-in search capabilities. With Tribler, users can find .torrent files held by random peers and taste buddies. It adds such an ability to the BitTorrent protocol using a gossip protocol, somewhat similar to the eXeem network which was shut down in 2005. The software includes the ability to recommend content as well. After a dozen downloads, the Tribler software can roughly estimate the download taste of the user, and recommend additional content.


title: BitTorrent

text: In May 2007, researchers at Cornell University published a paper proposing a new approach to searching a peer-to-peer network for inexact strings, which could replace the functionality of a central indexing site. A year later, the same team implemented the system as a plugin for Vuze called Cubit and published a follow-up paper reporting its success.


title: BitTorrent

text: A somewhat similar facility but with a slightly different approach is provided by the BitComet client through its "Torrent Exchange" feature. Whenever two peers using BitComet (with Torrent Exchange enabled) connect to each other they exchange lists of all the torrents (name and info-hash) they have in the Torrent Share storage (torrent files which were previously downloaded and for which the user chose to enable sharing by Torrent Exchange). Thus each client builds up a list of all the torrents shared by the peers it connected to in the current session (or it can even maintain the list between sessions if instructed).


title: BitTorrent

text: At any time the user can search into that Torrent Collection list for a certain torrent and sort the list by categories. When the user chooses to download a torrent from that list, the .torrent file is automatically searched for (by info-hash value) in the DHT Network and when found it is downloaded by the querying client which can after that create and initiate a downloading task.


title: BitTorrent

text: Users find a torrent of interest on a torrent index site or by using a search engine built into the client, download it, and open it with a BitTorrent client. The client connects to the tracker(s) or seeds specified in the torrent file, from which it receives a list of seeds and peers currently transferring pieces of the file(s). The client connects to those peers to obtain the various pieces. If the swarm contains only the initial seeder, the client connects directly to it, and begins to request pieces. Clients incorporate mechanisms to optimize their download and upload rates.


title: BitTorrent

text: The effectiveness of this data exchange depends largely on the policies that clients use to determine to whom to send data. Clients may prefer to send data to peers that send data back to them (a "tit for tat" exchange scheme), which encourages fair trading. But strict policies often result in suboptimal situations, such as when newly joined peers are unable to receive any data because they don't have any pieces yet to trade themselves or when two peers with a good connection between them do not exchange data simply because neither of them takes the initiative. To counter these effects, the official BitTorrent client program uses a mechanism called "optimistic unchoking", whereby the client reserves a portion of its available bandwidth for sending pieces to random peers (not necessarily known good partners, so called preferred peers) in hopes of discovering even better partners and to ensure that newcomers get a chance to join the swarm.


title: BitTorrent

text: Although "swarming" scales well to tolerate "flash crowds" for popular content, it is less useful for unpopular or niche market content. Peers arriving after the initial rush might find the content unavailable and need to wait for the arrival of a "seed" in order to complete their downloads. The seed arrival, in turn, may take long to happen (this is termed the "seeder promotion problem"). Since maintaining seeds for unpopular content entails high bandwidth and administrative costs, this runs counter to the goals of publishers that value BitTorrent as a cheap alternative to a client-server approach. This occurs on a huge scale; measurements have shown that 38% of all new torrents become unavailable within the first month. A strategy adopted by many publishers which significantly increases availability of unpopular content consists of bundling multiple files in a single swarm. More sophisticated solutions have also been proposed; generally, these use cross-torrent mechanisms through which multiple torrents can cooperate to better share content.


title: BitTorrent

text: The peer distributing a data file treats the file as a number of identically sized pieces, usually with byte sizes of a power of 2, and typically between 32 kB and 16 MB each. The peer creates a hash for each piece, using the SHA-1 hash function, and records it in the torrent file. Pieces with sizes greater than 512 kB will reduce the size of a torrent file for a very large payload, but is claimed to reduce the efficiency of the protocol. When another peer later receives a particular piece, the hash of the piece is compared to the recorded hash to test that the piece is error-free. Peers that provide a complete file are called seeders, and the peer providing the initial copy is called the initial seeder. The exact information contained in the torrent file depends on the version of the BitTorrent protocol.


title: BitTorrent

text: By convention, the name of a torrent file has the suffix codice_1. Torrent files use the Bencode file format, and contain an "announce" section, which specifies the URL of the tracker, and an "info" section, containing (suggested) names for the files, their lengths, the piece length used, and a SHA-1 hash code for each piece, all of which are used by clients to verify the integrity of the data they receive. Though SHA-1 has shown signs of cryptographic weakness, Bram Cohen did not initially consider the risk big enough for a backward incompatible change to, for example, SHA-3. As of BitTorrent v2 the hash function has been updated to SHA-256.


title: BitTorrent

text: In the early days, torrent files were typically published to torrent index websites, and registered with at least one tracker. The tracker maintained lists of the clients currently connected to the swarm. Alternatively, in a "trackerless system" (decentralized tracking) every peer acts as a tracker. Azureus was the first BitTorrent client to implement such a system through the distributed hash table (DHT) method. An alternative and incompatible DHT system, known as Mainline DHT, was released in the Mainline BitTorrent client three weeks later (though it had been in development since 2002) and subsequently adopted by the μTorrent, Transmission, rTorrent, KTorrent, BitComet, and Deluge clients.


title: BitTorrent

text: After the DHT was adopted, a "private" flag – analogous to the broadcast flag – was unofficially introduced, telling clients to restrict the use of decentralized tracking regardless of the user's desires. The flag is intentionally placed in the info section of the torrent so that it cannot be disabled or removed without changing the identity of the torrent. The purpose of the flag is to prevent torrents from being shared with clients that do not have access to the tracker. The flag was requested for inclusion in the official specification in August 2008, but has not been accepted yet. Clients that have ignored the private flag were banned by many trackers, discouraging the practice.


title: BitTorrent

text: BitTorrent does not, on its own, offer its users anonymity. One can usually see the IP addresses of all peers in a swarm in one's own client or firewall program. This may expose users with insecure systems to attacks. In some countries, copyright organizations scrape lists of peers, and send takedown notices to the internet service provider of users participating in the swarms of files that are under copyright. In some jurisdictions, copyright holders may launch lawsuits against uploaders or downloaders for infringement, and police may arrest suspects in such cases.


title: BitTorrent

text: Various means have been used to promote anonymity. For example, the BitTorrent client Tribler makes available a Tor-like onion network, optionally routing transfers through other peers to obscure which client has requested the data. The exit node would be visible to peers in a swarm, but the Tribler organization provides exit nodes. One advantage of Tribler is that clearnet torrents can be downloaded with only a small decrease in download speed from one "hop" of routing.


title: BitTorrent

text: i2p provides a similar anonymity layer although in that case, one can only download torrents that have been uploaded to the i2p network. The bittorrent client Vuze allows users who are not concerned about anonymity to take clearnet torrents, and make them available on the i2p network.


title: BitTorrent

text: Most BitTorrent clients are not designed to provide anonymity when used over Tor, and there is some debate as to whether torrenting over Tor acts as a drag on the network.


title: BitTorrent

text: Private torrent trackers are usually invitation only, and require members to participate in uploading, but have the downside of a single centralized point of failure. Oink's Pink Palace and What.cd are examples of private trackers which have been shut down.


title: BitTorrent

text: Seedbox services download the torrent files first to the company's servers, allowing the user to direct download the file from there. One's IP address would be visible to the Seedbox provider, but not to third parties.


title: BitTorrent

text: Virtual private networks encrypt transfers, and substitute a different IP address for the user's, so that anyone monitoring a torrent swarm will only see that address.


title: BitTorrent

text: On 2 May 2005, Azureus 2.3.0.0 (now known as Vuze) was released, introducing support for "trackerless" torrents through a system called the "distributed database." This system is a Distributed hash table implementation which allows the client to use torrents that do not have a working BitTorrent tracker. Instead just bootstrapping server is used (router.bittorrent.com, dht.transmissionbt.com or router.utorrent.com). The following month, BitTorrent, Inc. released version 4.2.0 of the Mainline BitTorrent client, which supported an alternative DHT implementation (popularly known as "Mainline DHT", outlined in a draft on their website) that is incompatible with that of Azureus. In 2014, measurement showed concurrent users of Mainline DHT to be from 10 million to 25 million, with a daily churn of at least 10 million.


title: BitTorrent

text: Current versions of the official BitTorrent client, μTorrent, BitComet, Transmission and BitSpirit all share compatibility with Mainline DHT. Both DHT implementations are based on Kademlia. As of version 3.0.5.0, Azureus also supports Mainline DHT in addition to its own distributed database through use of an optional application plugin. This potentially allows the Azureus/Vuze client to reach a bigger swarm.


title: BitTorrent

text: Another idea that has surfaced in Vuze is that of "virtual torrents". This idea is based on the distributed tracker approach and is used to describe some web resource. Currently, it is used for instant messaging. It is implemented using a special messaging protocol and requires an appropriate plugin. Anatomic P2P is another approach, which uses a decentralized network of nodes that route traffic to dynamic trackers. Most BitTorrent clients also use Peer exchange (PEX) to gather peers in addition to trackers and DHT. Peer exchange checks with known peers to see if they know of any other peers. With the 3.0.5.0 release of Vuze, all major BitTorrent clients now have compatible peer exchange.


title: BitTorrent

text: Web "seeding" was implemented in 2006 as the ability of BitTorrent clients to download torrent pieces from an HTTP source in addition to the "swarm". The advantage of this feature is that a website may distribute a torrent for a particular file or batch of files and make those files available for download from that same web server; this can simplify long-term seeding and load balancing through the use of existing, cheap, web hosting setups. In theory, this would make using BitTorrent almost as easy for a web publisher as creating a direct HTTP download. In addition, it would allow the "web seed" to be disabled if the swarm becomes too popular while still allowing the file to be readily available. This feature has two distinct specifications, both of which are supported by Libtorrent and the 26+ clients that use it.


title: BitTorrent

text: The first was created by John "TheSHAD0W" Hoffman, who created BitTornado. This first specification requires running a web service that serves content by info-hash and piece number, rather than filename.


title: BitTorrent

text: The other specification is created by GetRight authors and can rely on a basic HTTP download space (using byte serving).


title: BitTorrent

text: In September 2010, a new service named Burnbit was launched which generates a torrent from any URL using webseeding. There are server-side solutions that provide initial seeding of the file from the web server via standard BitTorrent protocol and when the number of external seeders reach a limit, they stop serving the file from the original source.


title: BitTorrent

text: A technique called broadcatching combines RSS feeds with the BitTorrent protocol to create a content delivery system, further simplifying and automating content distribution. Steve Gillmor explained the concept in a column for Ziff-Davis in December 2003. The discussion spread quickly among bloggers (Ernest Miller, Chris Pirillo, etc.). In an article entitled "Broadcatching with BitTorrent", Scott Raymond explained:


title: BitTorrent

text: The RSS feed will track the content, while BitTorrent ensures content integrity with cryptographic hashing of all data, so feed subscribers will receive uncorrupted content. One of the first and popular software clients (free and open source) for "broadcatching" is Miro. Other free software clients such as PenguinTV and KatchTV are also now supporting broadcatching. The BitTorrent web-service MoveDigital added the ability to make torrents available to any web application capable of parsing XML through its standard REST-based interface in 2006, though this has since been discontinued. Additionally, Torrenthut is developing a similar torrent API that will provide the same features, and help bring the torrent community to Web 2.0 standards. Alongside this release is a first PHP application built using the API called PEP, which will parse any Really Simple Syndication (RSS 2.0) feed and automatically create and seed a torrent for each enclosure found in that feed.


title: BitTorrent

text: Since BitTorrent makes up a large proportion of total traffic, some ISPs have chosen to "throttle" (slow down) BitTorrent transfers. For this reason, methods have been developed to disguise BitTorrent traffic in an attempt to thwart these efforts. Protocol header encrypt (PHE) and Message stream encryption/Protocol encryption (MSE/PE) are features of some BitTorrent clients that attempt to make BitTorrent hard to detect and throttle. As of November 2015, Vuze, Bitcomet, KTorrent, Transmission, Deluge, μTorrent, MooPolice, Halite, qBittorrent, rTorrent, and the latest official BitTorrent client (v6) support MSE/PE encryption.


title: BitTorrent

text: In August 2007, Comcast was preventing BitTorrent seeding by monitoring and interfering with the communication between peers. Protection against these efforts is provided by proxying the client-tracker traffic via an encrypted tunnel to a point outside of the Comcast network. In 2008, Comcast called a "truce" with BitTorrent, Inc. with the intention of shaping traffic in a protocol-agnostic manner. Questions about the ethics and legality of Comcast's behavior have led to renewed debate about net neutrality in the United States. In general, although encryption can make it difficult to determine "what" is being shared, BitTorrent is vulnerable to traffic analysis. Thus, even with MSE/PE, it may be possible for an ISP to recognize BitTorrent and also to determine that a system is no longer downloading but only uploading data, and terminate its connection by injecting TCP RST (reset flag) packets.


title: BitTorrent

text: Another unofficial feature is an extension to the BitTorrent metadata format proposed by John Hoffman and implemented by several indexing websites. It allows the use of multiple trackers per file, so if one tracker fails, others can continue to support file transfer. It is implemented in several clients, such as BitComet, BitTornado, BitTorrent, KTorrent, Transmission, Deluge, μTorrent, rtorrent, Vuze, and Frostwire. Trackers are placed in groups, or tiers, with a tracker randomly chosen from the top tier and tried, moving to the next tier if all the trackers in the top tier fail.


title: BitTorrent

text: Torrents with multiple trackers can decrease the time it takes to download a file, but also have a few consequences:


title: BitTorrent

text: BitTorrent, Inc. was working with Oversi on new Policy Discover Protocols that query the ISP for capabilities and network architecture information. Oversi's ISP hosted NetEnhancer box is designed to "improve peer selection" by helping peers find local nodes, improving download speeds while reducing the loads into and out of the ISP's network.


title: BitTorrent

text: The BitTorrent specification is free to use and many clients are open source, so BitTorrent clients have been created for all common operating systems using a variety of programming languages. The official BitTorrent client, μTorrent, qBittorrent, Transmission, Vuze, and BitComet are some of the most popular clients.


title: BitTorrent

text: Some BitTorrent implementations such as MLDonkey and Torrentflux are designed to run as servers. For example, this can be used to centralize file sharing on a single dedicated server which users share access to on the network. Server-oriented BitTorrent implementations can also be hosted by hosting providers at co-located facilities with high bandwidth Internet connectivity (e.g., a datacenter) which can provide dramatic speed benefits over using BitTorrent from a regular home broadband connection. Services such as ImageShack can download files on BitTorrent for the user, allowing them to download the entire file by HTTP once it is finished.


title: BitTorrent

text: The Opera web browser supports BitTorrent natively. Brave web browser ships with an extension which supports WebTorrent, a BitTorrent-like protocol based on WebRTC instead of UDP and TCP. BitLet allowed users to download Torrents directly from their browser using a Java applet (until browsers removed support for Java applets). An increasing number of hardware devices are being made to support BitTorrent. These include routers and NAS devices containing BitTorrent-capable firmware like OpenWrt. Proprietary versions of the protocol which implement DRM, encryption, and authentication are found within managed clients such as Pando.


title: BitTorrent

text: A growing number of individuals and organizations are using BitTorrent to distribute their own or licensed works (e.g. indie bands distributing digital files of their new songs). Independent adopters report that BitTorrent technology reduces demands on private networking hardware and bandwidth, an essential for non-profit groups with large amounts of internet traffic.


title: BitTorrent

text: Some uses of BitTorrent for file sharing may violate laws in some jurisdictions (see legislation section).


title: BitTorrent

text: Routers that use network address translation (NAT) must maintain tables of source and destination IP addresses and ports. Because BitTorrent frequently contacts 20–30 servers per second, the NAT tables of some consumer-grade routers are rapidly filled. This is a known cause of some home routers ceasing to work correctly.


title: BitTorrent

text: Although the protocol itself is legal, problems stem from using the protocol to traffic copyright infringing works, since BitTorrent is often used to download otherwise paid content, such as movies and video games. There has been much controversy over the use of BitTorrent trackers. BitTorrent metafiles themselves do not store file contents. Whether the publishers of BitTorrent metafiles violate copyrights by linking to copyrighted works without the authorization of copyright holders is controversial. Various jurisdictions have pursued legal action against websites that host BitTorrent trackers.


title: BitTorrent

text: High-profile examples include the closing of Suprnova.org, TorrentSpy, LokiTorrent, BTJunkie, Mininova, Oink's Pink Palace and What.cd. BitTorrent search engine The Pirate Bay torrent website, formed by a Swedish group, is noted for the "legal" section of its website in which letters and replies on the subject of alleged copyright infringements are publicly displayed. On 31 May 2006, The Pirate Bay's servers in Sweden were raided by Swedish police on allegations by the MPAA of copyright infringement; however, the tracker was up and running again three days later. In the study used to value NBC Universal in its merger with Comcast, Envisional examined the 10,000 torrent swarms managed by PublicBT which had the most active downloaders. After excluding pornographic and unidentifiable content, it was found that only one swarm offered legitimate content.


title: BitTorrent

text: In the United States, more than 200,000 lawsuits have been filed for copyright infringement on BitTorrent since 2010. In the United Kingdom, on 30 April 2012, the High Court of Justice ordered five ISPs to block The Pirate Bay.


title: BitTorrent

text: One concern is the UDP flood attack. BitTorrent implementations often use μTP for their communication. To achieve high bandwidths, the underlying protocol used is UDP, which allows spoofing of source addresses of internet traffic. It has been possible to carry out Denial-of-service attacks in a P2P lab environment, where users running BitTorrent clients act as amplifiers for an attack at another service. However this is not always an effective attack because ISPs can check if the source address is correct.


title: BitTorrent

text: Several studies on BitTorrent found files available for download containing malware. In particular, one small sample indicated that 18% of all executable programs available for download contained malware. Another study claims that as much as 14.5% of BitTorrent downloads contain zero-day malware, and that BitTorrent was used as the distribution mechanism for 47% of all zero-day malware they have found.


title: Table tennis

text: Table tennis, also known as ping-pong and whiff-whaff, is a sport in which two or four players hit a lightweight ball, also known as the ping-pong ball, back and forth across a table using small solid rackets. It takes place on a hard table divided by a net. Except for the initial serve, the rules are generally as follows: Players must allow a ball played toward them to bounce once on their side of the table and must return it so that it bounces on the opposite side. A point is scored when a player fails to return the ball within the rules. Play is fast and demands quick reactions. Spinning the ball alters its trajectory and limits an opponent's options, giving the hitter a great advantage.


title: Table tennis

text: Table tennis is governed by the worldwide organization International Table Tennis Federation (ITTF), founded in 1926. ITTF currently includes 226 member associations. The official rules are specified in the ITTF handbook. Table tennis has been an Olympic sport since 1988, with several event categories. From 1988 until 2004, these were men's singles, women's singles, men's doubles and women's doubles. Since 2008, a team event has been played instead of the doubles.


title: Table tennis

text: The sport originated in Victorian England, where it was played among the upper-class as an after-dinner parlour game. It has been suggested that makeshift versions of the game were developed by British military officers in India around the 1860s or 1870s, who brought it back with them. A row of books stood up along the center of the table as a net, two more books served as rackets and were used to continuously hit a golf-ball.


title: Table tennis

text: The name "ping-pong" was in wide use before British manufacturer J. Jaques & Son Ltd trademarked it in 1901. The name "ping-pong" then came to describe the game played using the rather expensive Jaques's equipment, with other manufacturers calling it table tennis. A similar situation arose in the United States, where Jaques sold the rights to the "ping-pong" name to Parker Brothers. Parker Brothers then enforced its trademark for the term in the 1920s, making the various associations change their names to "table tennis" instead of the more common, but trademarked, term.


title: Table tennis

text: The next major innovation was by James W. Gibb, a British enthusiast of table tennis, who discovered novelty celluloid balls on a trip to the US in 1901 and found them to be ideal for the game. This was followed by E.C. Goode who, in 1901, invented the modern version of the racket by fixing a sheet of pimpled, or stippled, rubber to the wooden blade. Table tennis was growing in popularity by 1901 to the extent that tournaments were being organized, books being written on the subject, and an unofficial world championship was held in 1902. In those early days, the scoring system was the same as in lawn tennis.


title: Table tennis

text: Although both a "Table Tennis Association" and a "Ping Pong Association" existed by 1910, a new Table Tennis Association was founded in 1921, and renamed the English Table Tennis Association in 1926. The International Table Tennis Federation (ITTF) followed in 1926. London hosted the first official World Championships in 1926. In 1933, the United States Table Tennis Association, now called USA Table Tennis, was formed.


title: Table tennis

text: In the 1930s, Edgar Snow commented in "Red Star Over China" that the Communist forces in the Chinese Civil War had a "passion for the English game of table tennis" which he found "bizarre". On the other hand, the popularity of the sport waned in 1930s Soviet Union, partly because of the promotion of team and military sports, and partly because of a theory that the game had adverse health effects.


title: Table tennis

text: In the 1950s, paddles that used a rubber sheet combined with an underlying sponge layer changed the game dramatically, introducing greater spin and speed. These were introduced to Britain by sports goods manufacturer S.W. Hancock Ltd. The use of speed glue beginning in the mid 1980s increased the spin and speed even further, resulting in changes to the equipment to "slow the game down". Table tennis was introduced as an Olympic sport at the Olympics in 1988.


title: Table tennis

text: After the 2000 Olympics in Sydney, the ITTF instituted several rule changes that were aimed at making table tennis more viable as a televised spectator sport. First, the older balls were officially replaced by balls in October 2000. This increased the ball's air resistance and effectively slowed down the game. By that time, players had begun increasing the thickness of the fast sponge layer on their paddles, which made the game excessively fast and difficult to watch on television. A few months later, the ITTF changed from a 21-point to an 11-point scoring system (and the serve rotation was reduced from five points to two), effective in September 2001. This was intended to make games more fast-paced and exciting. The ITTF also changed the rules on service to prevent a player from hiding the ball during service, in order to increase the average length of rallies and to reduce the server's advantage, effective in 2002.


title: Table tennis

text: For the opponent to have time to realize a serve is taking place, the ball must be tossed a minimum of in the air. The ITTF states that all events after July 2014 are played with a new poly material ball.


title: Table tennis

text: The international rules specify that the game is played with a sphere having a mass of and a diameter of . The rules say that the ball shall bounce up when dropped from a height of onto a standard steel block thereby having a coefficient of restitution of 0.89 to 0.92. As of 2015, balls are now made of a polymer instead of celluloid, colored white or orange, with a matte finish. The choice of ball color is made according to the table color and its surroundings. For example, a white ball is easier to see on a green or blue table than it is on a grey table. Manufacturers often indicate the quality of the ball with a star rating system, usually from one to three, three being the highest grade. As this system is not standard across manufacturers, the only way a ball may be used in official competition is upon ITTF approval (the ITTF approval can be seen printed on the ball).


title: Table tennis

text: The 40 mm ball was introduced after the end of the 2000 Summer Olympics; previously a 38 mm ball was standard. This created some controversies. Vladimir Samsonov, the World No. 1 table tennis professional at the time, threatened to pull out of the World Cup, which was scheduled to debut the new regulation ball on 12 October 2000.


title: Table tennis

text: The table is long, wide, and high with any continuous material so long as the table yields a uniform bounce of about when a standard ball is dropped onto it from a height of , or about . The table or playing surface is uniformly dark colored and matte, divided into two halves by a net at in height. The ITTF approves only wooden tables or their derivates. Concrete tables with a steel net or a solid concrete partition are sometimes available in outside public spaces, such as parks.


title: Table tennis

text: ITTF regulations require a playing space of at least long by wide, and a height clearance of at least . For wheelchair events, the minimums are long and wide.


title: Table tennis

text: Players are equipped with a laminated wooden racket covered with rubber on one or two sides depending on the grip of the player. The ITTF uses the term "racket", though "bat" is common in Britain, and "paddle" in the U.S. and Canada.


title: Table tennis

text: The wooden portion of the racket, often referred to as the "blade", commonly features anywhere between one and seven plies of wood, though cork, glass fiber, carbon fiber, aluminum fiber, and Kevlar are sometimes used. According to the ITTF regulations, at least 85% of the blade by thickness shall be of natural wood. Common wood types include balsa, limba, cypress, and hinoki, which is popular in Japan. The average size of the blade is about long and wide. Although the official restrictions only focus on the flatness and rigidity of the blade itself, these dimensions are optimal for most play styles.


title: Table tennis

text: Table tennis regulations allow different rubber surfaces on each side of the racket. Various types of surfaces provide various levels of spin or speed, and in some cases they nullify spin. For example, a player may have a rubber that provides much spin on one side of their racket, and one that provides no spin on the other. By flipping the racket in play, different types of returns are possible. To help a player distinguish between the rubber used by his opposing player, international rules specify that one side must be black while the other side must be a bright color clearly distinguishable from black and from the color of the ball. The player has the right to inspect their opponent's racket before a match to see the type of rubber used and what color it is. Despite high-speed play and rapid exchanges, a player can see clearly what side of the racket was used to hit the ball. Current rules state that, unless damaged in play, the racket cannot be exchanged for another racket at any time during a match.


title: Table tennis

text: According to ITTF rule 2.13.1, the first service is decided by lot, normally a coin toss. It is also common for one player (or the umpire/scorer) to hide the ball in one or the other hand, usually hidden under the table, allowing the other player to guess which hand the ball is in. The correct or incorrect guess gives the "winner" the option to choose to serve, receive, or to choose which side of the table to use. (A common but non-sanctioned method is for the players to play the ball back and forth three times and then play out the point. This is commonly referred to as "serve to play", "rally to serve", "play for serve", or "volley for serve".)


title: Table tennis

text: In game play, the player serving the ball commences a play. The server first stands with the ball held on the open palm of the hand not carrying the paddle, called the freehand, and tosses the ball directly upward without spin, at least high. The server strikes the ball with the racket on the ball's descent so that it touches first his court and then touches directly the receiver's court without touching the net assembly. In casual games, many players do not toss the ball upward; however, this is technically illegal and can give the serving player an unfair advantage.


title: Table tennis

text: The ball must remain behind the endline and above the upper surface of the table, known as the playing surface, at all times during the service. The server cannot use his/her body or clothing to obstruct sight of the ball; the opponent and the umpire must have a clear view of the ball at all times. If the umpire is doubtful of the legality of a service they may first interrupt play and give a warning to the server. If the serve is a clear failure or is doubted again by the umpire after the warning, the receiver scores a point.


title: Table tennis

text: If the service is "good", then the receiver must make a "good" return by hitting the ball back before it bounces a second time on receiver's side of the table so that the ball passes the net and touches the opponent's court, either directly or after touching the net assembly. Thereafter, the server and receiver must alternately make a return until the rally is over. Returning the serve is one of the most difficult parts of the game, as the server's first move is often the least predictable and thus most advantageous shot due to the numerous spin and speed choices at his or her disposal.


title: Table tennis

text: A let is also called foul service, if the ball hits the server's side of the table, if the ball does not pass further than the edge, and if the ball hits the table edge and hits the net.


title: Table tennis

text: A game shall be won by the player first scoring 11 points unless both players score 10 points, when the game shall be won by the first player subsequently gaining a lead of 2 points. A match shall consist of the best of any odd number of games. In competition play, matches are typically best of five or seven games.


title: Table tennis

text: Service alternates between opponents every two points (regardless of winner of the rally) until the end of the game, unless both players score ten points or the expedite system is operated, when the sequences of serving and receiving stay the same but each player serves for only one point in turn (Deuce). The player serving first in a game receives first in the next game of the match.


title: Table tennis

text: After each game, players switch sides of the table. In the last possible game of a match, for example the seventh game in a best of seven match, players change ends when the first player scores five points, regardless of whose turn it is to serve. If the sequence of serving and receiving is out of turn or the ends are not changed, points scored in the wrong situation are still calculated and the game shall be resumed with the order at the score that has been reached.


title: Table tennis

text: In addition to games between individual players, pairs may also play table tennis. Singles and doubles are both played in international competition, including the Olympic Games since 1988 and the Commonwealth Games since 2002.


title: Table tennis

text: If a game is unfinished after 10 minutes of play and fewer than 18 points have been scored, the expedite system is initiated. The umpire interrupts the game, and the game resumes with players serving for one point in turn. If the expedite system is introduced while the ball is not in play, the previous receiver shall serve first. Under the expedite system, the server must win the point before the opponent makes 13 consecutive returns or the point goes to the opponent. The system can also be initiated at any time at the request of both players or pairs. Once introduced, the expedite system remains in force until the end of the match. A rule to shorten the time of a match, it is mainly seen in defensive players' games.


title: Table tennis

text: Though table tennis players grip their rackets in various ways, their grips can be classified into two major families of styles, "penhold" and "shakehand". The rules of table tennis do not prescribe the manner in which one must grip the racket, and numerous grips are employed.


title: Table tennis

text: The penhold grip is so-named because one grips the racket similarly to the way one holds a writing instrument. The style of play among penhold players can vary greatly from player to player. The most popular style, usually referred to as the Chinese penhold style, involves curling the middle, ring, and fourth finger on the back of the blade with the three fingers always touching one another. Chinese penholders favour a round racket head, for a more over-the-table style of play. In contrast, another style, sometimes referred to as the Japanese/Korean penhold grip, involves splaying those three fingers out across the back of the racket, usually with all three fingers touching the back of the racket, rather than stacked upon one another. Sometimes a combination of the two styles occurs, wherein the middle, ring and fourth fingers are straight, but still stacked, or where all fingers may be touching the back of the racket, but are also in contact with one another. Japanese and Korean penholders will often use a square-headed racket for an away-from-the-table style of play. Traditionally these square-headed rackets feature a block of cork on top of the handle, as well as a thin layer of cork on the back of the racket, for increased grip and comfort. Penhold styles are popular among players originating from East Asian countries such as China, Japan, South Korea, and Taiwan.


title: Table tennis

text: Traditionally, penhold players use only one side of the racket to hit the ball during normal play, and the side which is in contact with the last three fingers is generally not used. This configuration is sometimes referred to as "traditional penhold" and is more commonly found in square-headed racket styles. However, the Chinese developed a technique in the 1990s in which a penholder uses both sides of the racket to hit the ball, where the player produces a backhand stroke (most often topspin) known as a reverse penhold backhand by turning the traditional side of the racket to face one's self, and striking the ball with the opposite side of the racket. This stroke has greatly improved and strengthened the penhold style both physically and psychologically, as it eliminates the strategic weakness of the traditional penhold backhand.


title: Table tennis

text: The shakehand grip is so-named because the racket is grasped as if one is performing a handshake. Though it is sometimes referred to as the "tennis" or "Western" grip, it bears no relation to the Western tennis grip, which was popularized on the West Coast of the United States in which the racket is rotated 90°, and played with the wrist turned so that on impact the knuckles face the target. In table tennis, "Western" refers to Western nations, for this is the grip that players native to Europe and the Americas have almost exclusively employed.


title: Table tennis

text: The shakehand grip's simplicity and versatility, coupled with the acceptance among top-level Chinese trainers that the European style of play should be emulated and trained against, has established it as a common grip even in China. Many world-class European and East Asian players currently use the shakehand grip, and it is generally accepted that shakehands is easier to learn than penholder, allowing a broader range of playing styles both offensive and defensive.


title: Table tennis

text: The Seemiller grip is named after the American table tennis champion Danny Seemiller, who used it. It is achieved by placing the thumb and index finger on either side of the bottom of the racquet head and holding the handle with the rest of the fingers. Since only one side of the racquet is used to hit the ball, two contrasting rubber types can be applied to the blade, offering the advantage of "twiddling" the racket to fool the opponent. Seemiller paired inverted rubber with anti-spin rubber. Many players today combine inverted and long-pipped rubber. The grip is considered exceptional for blocking, especially on the backhand side, and for forehand loops of backspin balls.


title: Table tennis

text: The Seemiller grip's popularity reached its apex in 1985 when four (Danny Seemiller, Ricky Seemiller, Eric Boggan and Brian Masters) of the United States' five participants in the World Championships used it.


title: Table tennis

text: The stance in table tennis is also known as the 'ready position'. It is the position every player initially adopts when receiving and returns to after playing a shot in order to be prepared to make the next shot. It involves the feet being spaced wider than shoulder width and a partial crouch being adopted; the crouch is an efficient posture for moving quickly from and also preloads the muscles enabling a more dynamic movement. The upper torso is positioned slightly forward and the player is looking forwards. The racket is held at the ready with a bent arm. The position should feel balanced and provide a solid base for striking and quick lateral movement. Players may tailor their stance based upon their personal preferences, and alter it during the game based upon the specific circumstances.


title: Table tennis

text: Also known as speed drive, a direct hit on the ball propelling it forward back to the opponent. This stroke differs from speed drives in other racket sports like tennis because the racket is primarily "perpendicular" to the direction of the stroke and most of the energy applied to the ball results in "speed" rather than "spin", creating a shot that does not arc much, but is fast enough that it can be difficult to return. A speed drive is used mostly for keeping the ball in play, applying pressure on the opponent, and potentially opening up an opportunity for a more powerful attack.


title: Table tennis

text: Perfected during the 1960s, the loop is essentially the reverse of the chop. The racket is "parallel" to the direction of the stroke ("closed") and the racket thus "grazes" the ball, resulting in a large amount of topspin. A good loop drive will arc quite a bit, and once striking the opponent's side of the table will jump forward, much like a kick serve in tennis. Most professional players nowadays, such as Ding Ning, Timo Boll and Zhang Jike, primarily use loop for offense.


title: Table tennis

text: The counter-hit is usually a counterattack against drives, normally high loop drives. The racket is held closed and near to the ball, which is hit with a short movement "off the bounce" (immediately after hitting the table) so that the ball travels faster to the other side. Kenta Matsudaira is known for primarily using counter-hit for offense.


title: Table tennis

text: When a player tries to attack a ball that has not bounced beyond the edge of the table, the player does not have the room to wind up in a "backswing". The ball "may still be attacked", however, and the resulting shot is called a flip because the backswing is compressed into a quick wrist action. A flip is not a single stroke and can resemble either a loop drive or a loop in its characteristics. What identifies the stroke is that the backswing is compressed into a short wrist flick.


title: Table tennis

text: A player will typically execute a smash when the opponent has returned a ball that bounces too high or too close to the net. It is nearly always done with a forehand stroke. "Smashing" uses rapid acceleration to impart as much speed on the ball as possible so that the opponent cannot react in time. The racket is generally perpendicular to the direction of the stroke. Because the speed is the main aim of this shot, the spin on the ball is often minimal, although it can be applied as well. An offensive table tennis player will think of a rally as a build-up to a winning smash. Smash is used more often with penhold grip.