Cuban Missile Crisis in Florida, warned on the Senate floor that the Soviet Union may be constructing a missile base in Cuba. He charged the Kennedy administration of covering up a major threat to the US, thereby starting the crisis. Air Force General Curtis LeMay presented a pre-invasion bombing plan to Kennedy in September, and spy flights and minor military harassment from US forces at Guantanamo Bay Naval Base were the subject of continual Cuban diplomatic complaints to the US government. The first consignment of R-12 missiles arrived on the night of September 8, followed by a second on September 16. The R-12
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