Kennedy’s presidency would be marked by an almost continuous exchange of letters with his chief cold war adversary, Soviet chairman Nikita Khrushchev. It would, in fact, be this unprecedented exchange that would seriously affect the course of history. Not all of the correspondence between the two men would be antagonistic, as evidenced by this letter from Kennedy thanking Khrushchev for having sent Caroline the puppy Pushinka, whose mother had flown in space.
