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
Cuban Missile Crisis Jupiter missiles as obsolescent and already supplanted by the Polaris nuclear ballistic submarine missiles. On the morning of October 27, a U-2F (the third CIA U-2A, modified for air-to-air refueling) piloted by USAF Major Rudolf Anderson, departed its forward operating location at McCoy AFB, Florida. At approximately 12:00 pm EDT, the aircraft was struck by a S-75 Dvina (NATO designation "SA-2 Guideline") surface-to-air missile launched from Cuba. The aircraft was shot down, and Anderson was killed. The stress in negotiations between the Soviets and the US intensified; it was only later believed that the decision to fire the missile was