Some things in life are certain. Like for example the fact that on November 22, 1963 President John F. Kennedy was shot twice while riding through downtown Dallas in his presidential convoy. Other things can be a bit more hazy. While Lee Harvey Oswald was accused of killing him and an official investigation declared him to be the lone assassin, it seems that a majority of people even today (70% in fact) are not buying it. Was there another gunman? Did the CIA want revenge for the Bay of Pigs? Were mobsters upset that his brother was cracking down on organized crime? Perhaps the world will never know.