"Bolshakov smuggled a letter, the first of 21 declassified in 1993, to JFK's press secretary, Pierre Salinger, in a folded newspaper. In it, Khrushchev expressed regret about Vienna and embraced JFKs proposal for a path to peace and disarmament."
Read, listen or watch here: JFK's Vision of Peace: RFK Jr. on John F. Kennedy's Attempts to End the Cold War.