Protesters sitting in Whitehall during a demonstration over the Cuban Missile Crisis. (Photo by Keystone/Getty Images)

Castro's troops at Playa de Citron after successfully repelling the US-backed invasion of the Bay of Pigs. (Photo by Graf/Getty Images)

A group of Cuban revolutionary Fidel Castro's soldiers with artillery after routing the US-backed invasion at the Bay of Pigs. (Photo by Graf/Getty Images)

Cuban militiamen and members of the Revolutionary Army celebrating their victory over US mercenaries at Playa Giron, in what became known as the Bay of Pigs Invasion. They are gathered in a launch belonging to the captured mercenaries. (Photo by Keystone/Getty Images)

US President John F. Kennedy (R) in a picture dated 03 June 1961 jokes with Soviet leader Nikita Khrushchev after a meeting at the US embassy in Vienna, one year before the beginning of the 1962 Cuban missile crisis. President Kennedy ordered a blockade of Cuba in October, 1962 after the Soviet Union began to transpot missiles on the island. (Photo credit should read AFP/Getty Images)

The front page of the New York American Journal, announcing that President John Kennedy has been shot and is reportedly dead. (Photo by Three Lions/Getty Images)

The coffin of assassinated American President John F. Kennedy is carried down the steps at St Matthew's Cathedral, Washington, after the requiem mass. Following the coffin is his widow Jackie Kennedy (centre), holding the hands of their children Caroline and John Jr. (1960 - 1999). Also in the group is Robert Kennedy. (Photo by Keystone/Getty Images)