Cuban Missile Crisis established a naval blockade on October 22 to prevent further missiles from reaching Cuba; Oval Office tapes during the crisis revealed that Kennedy had also put the blockade in place as an attempt to provoke Soviet-backed forces in Berlin as well. The US announced it would not permit offensive weapons to be delivered to Cuba and demanded that the weapons already in Cuba be dismantled and returned to the Soviet Union. After several days of tense negotiations, an agreement was reached between US President John F. Kennedy and Khrushchev. Publicly, the Soviets would dismantle their offensive weapons in Cuba and
Missile gap a dangerous extremist, who worked with the American military to plant the idea of a Soviet first-strike capability to justify a pre-emptive American attack. That belief about Kennedy as a militarist was reinforced in Soviet minds by the Bay of Pigs invasion of 1961, which led to the Cuban Missile Crisis after the Soviets placed nuclear missiles in Cuba in 1962. A second claim of a missile gap appeared in 1974. Albert Wohlstetter, a professor at the University of Chicago, accused the CIA of systematically underestimating Soviet missile deployment in his 1974 foreign policy article, "Is There a Strategic Arms