John F. Kennedy, the 35th president of the United States, was assassinated at 12:30 p.m. Central Standard Time on Friday, November 22, 1963, in Dealey Plaza, Dallas, Texas. Fatally shot by Lee Harvey Oswald, Kennedy was traveling with his wife, Jacqueline, Texas Governor John Connally, and Connally's wife, Nellie, in a presidential motorcade. A 10-month investigation from November 1963 to September 1964 by the Warren Commission concluded that Oswald acted alone in shooting Kennedy, and that Jack Ruby also acted alone when he killed Oswald before he could stand trial. Kennedy's death marked the fourth and most recent assassination of an American President. Vice President Lyndon B. Johnson became president upon Kennedy's death, taking the constitutionally prescribed oath of office onboard Air Force One at Dallas's Love Field airport before departing for Washington, D.C.
In contrast to the conclusions of the Warren Commission, the United States House Select Committee on Assassinations (HSCA) concluded in 1979 that Kennedy was "probably assassinated as a result of a conspiracy". The HSCA agreed with the Warren Commission in that Kennedy's and Connally's injuries were caused by Oswald's three rifle shots, but they also determined the existence of additional gunshots based on analysis of an audio recording and therefore "... a high probability that two gunmen fired at [the] President". The Committee was not able to identify any individuals or groups involved with the conspiracy. In addition, the HSCA found that the original federal investigations were "seriously flawed" in respect of information-sharing and the possibility of conspiracy. As recommended by the HSCA, the acoustic evidence indicating conspiracy was subsequently re-examined and rejected.