In November 1963, John F Kennedy was assassinated in Dallas, Texas. Lee Harvey Oswald, a former US Marine who defected to the Soviet Union before returning to America, was accused of the crime but was shot dead before he could stand trial. But was he just a scapegoat? Did the real killers get away with murder? No official investigation has turned up evidence of a conspiracy, but theories implicating everyone from the KGB to Jackie Kennedy continue to circulate.
