Answer:
John Kennedy and Nikita Khrushchev arrived during the serious crisis of 1962 to an agreement to withdraw the Soviet missiles from Cuba in exchange for an American commitment not to invade the island or allow anyone else to do so, according to letters from both leaders that, 30 years later, they have been made public by the American secret service. The well-known letters - written in the period between October 30 and December 12, 1962 - reveal a dialogue between the two presidents that is much more serene and conciliatory. It was assumed during the missile crisis, when the world had to face one of the greatest threats of nuclear war of this century.