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 pm EDT, Kennedy delivered a nationwide televised address on all of the major networks announcing the discovery of the missiles. He noted: Kennedy described the administration's plan: During the speech, a directive went out to all US forces worldwide, placing them on DEFCON 3. The heavy cruiser was designated flagship for the blockade, with as "Newport News"s destroyer escort. On October 23, at 11:24 am EDT, a cable, drafted by George Wildman Ball to the US Ambassador in Turkey and NATO, notified them that they were considering making an offer to withdraw what the US knew to be nearly-obsolete missiles