John Fitzgerald Kennedy (1917–1963) was the 35th president of the United States, serving from January 1961 until he was assassinated in Dallas on November 22, 1963. Born in Brookline, Massachusetts, he graduated from Harvard in 1940 and, in the Second World War, commanded the torpedo boat PT-109, earning decorations after a Japanese destroyer cut it in half in 1943. He represented Massachusetts in the House from 1947 and in the Senate from 1953, then narrowly defeated Vice President Richard Nixon in 1960 to become the youngest elected president and the first Roman Catholic in the office.

His presidency included the failed Bay of Pigs invasion, the founding of the Peace Corps and the Cuban Missile Crisis of October 1962, and in 1963 he signed the Partial Nuclear Test Ban Treaty. He also set the goal of landing a man on the Moon before 1970. Crisis, secrecy and the space race later made him a recurring figure in UFO stories about what presidents were told, and NBC's 1996 series Dark Skies folded his presidency into its fictional history of an alien conspiracy.

The Majestic 12 papers of the 1980s, which the FBI called bogus, were followed by a stream of further papers in the same style, many supplied by researcher Timothy Cooper from 1992, and some of them invoked the Kennedy years. Stanton Friedman, the leading defender of the original set, argued that Cooper's papers were fictions. A partly burned page that surfaced in 1999 from an anonymous source claiming to be a former CIA employee purports to show officials alarmed by Kennedy's inquiries into their activities; it has never been verified, and most historians regard it as a fake.

The most cited item is a memo dated November 12, 1963, in which Kennedy supposedly told CIA Director John McCone to organize the agency's UFO intelligence files and brief him on the "unknowns" by the following February. It appeared in paranormal researcher William Lester's 2010 book A Celebration of Freedom: JFK and the New Frontier, and Lester says he obtained it from the CIA under the Freedom of Information Act. In 2011 a John F. Kennedy Presidential Library technician could find no copy in the president's files and said, "Something is a little odd about it," pointing to unusual redactions and missing top-secret markings. Lester argues that Kennedy had practical reasons to ask, such as concern that the Soviets might mistake UFOs for provocative American aircraft.

The debate continued in 2026. Harald Malmgren, a trade negotiator who passed away in 2025 after saying in interviews that he had investigated for Kennedy an object knocked down by an October 1962 nuclear test, was contradicted by journalist Douglas Dean Johnson's review of his federal records, updated in August 2026, and by former Kennedy Library historian Sheldon Stern, who wrote that Malmgren's name "was never heard nor cited" on the missile-crisis tapes. In a March 2026 Substack article, Australian researcher Geoff Cruickshank argued that J. Patrick Coyne, whom he describes as a trusted Kennedy adviser, was an MJ-12 "double agent." Kennedy's documented legacy is the nuclear standoff he defused, the test-ban treaty he signed and the lunar program he launched; his place in UFO history rests on papers archivists could not find or authenticate and on testimony gathered long after 1963.