Cuban Missile Crisis the blockade from 6:45 pm EST on November 20, 1962. At the time when the Kennedy administration thought that the Cuban Missile Crisis was resolved, nuclear tactical rockets stayed in Cuba since they were not part of the Kennedy-Khrushchev understandings and the Americans did not know about them. The Soviets changed their minds, fearing possible future Cuban militant steps, and on November 22, 1962, Deputy Premier of the Soviet Union Anastas Mikoyan told Castro that the rockets with the nuclear warheads were being removed as well. In his negotiations with the Soviet Ambassador Anatoly Dobrynin, Robert Kennedy informally proposed that
Cuban Missile Crisis U-2 by a Soviet missile violated direct orders from Moscow, and Cuban antiaircraft fire against other US reconnaissance aircraft also violated direct orders from Khrushchev to Castro. Second, the Soviets already had 162 nuclear warheads on Cuba that the US did not then believe were there. Third, the Soviets and Cubans on the island would almost certainly have responded to an invasion by using those nuclear weapons, even though Castro believed that every human in Cuba would likely die as a result. Khrushchev also knew but may not have considered the fact that he had submarines armed with nuclear weapons