Cuban Missile Crisis missiles already on the island. At 3:00 pm EDT on October 22, President Kennedy formally established the Executive Committee (EXCOMM) with National Security Action Memorandum (NSAM) 196. At 5:00 pm, he met with Congressional leaders who contentiously opposed a blockade and demanded a stronger response. In Moscow, Ambassador Foy D. Kohler briefed Khrushchev on the pending blockade and Kennedy's speech to the nation. Ambassadors around the world gave notice to non-Eastern Bloc leaders. Before the speech, US delegations met with Canadian Prime Minister John Diefenbaker, British Prime Minister Harold Macmillan, West German Chancellor Konrad Adenauer, French President Charles de Gaulle
577th Strategic Missile Squadron dispersed launch sites comprised the missile squadron. In August 1962, the squadron was the first to place an Atlas F missile on alert status. In October, all 12 missiles were put on alert status as a result of the Cuban Missile Crisis. The Atlas F was the final and most advanced version of the Atlas ICBM and was stored in a vertical position inside underground concrete and steel silos. When stored, the Atlas F sat atop an elevator. If a missile was placed on alert, it was fueled with RP-1 (kerosene) liquid fuel, which could be stored inside the missile