Lee Harvey Oswald assassinated President John F. Kennedy
on November 22, 1963. Lee Harvey Oswald was a drifter with a murky past; he had been dishonorably discharged from the U.S. Marines and then defected to Russia in 1959, only to be refused citizenship there and sent back to the United States. Oswald is believed to have shot Kennedy with a sniper's rifle from the sixth floor of the Texas School Book Depository as the president's motorcade traveled through Dallas. Oswald was arrested hours later in a movie theater, after also shooting and killing police officer J.D. Tippet. Lee Harvey Oswald was never tried: two days later he himself was shot to death by nightclub owner Jack Ruby
while Oswald was being transferred inside Dallas police headquarters. In 1964 the so-called Warren Commission -- a special commission headed by Chief Justice Earl Warren
-- decided that Oswald, acting alone, had shot and killed the president.