“My fellow Americans, with a heavy heart, and in necessary fulfillment of my oath of office, I have ordered – and the United States Air Force has now carried out – military operations with conventional weapons only, to remove a major nuclear weapons build-up from the soil of Cuba.” These are the words President Kennedy almost delivered in October 1962 announcing what could have been World War III. This draft speech is among several thousand drafts, letters, and handwritten notes from Robert F. Kennedy’s personal files that have just last week been opened at the John F. Kennedy Presidential Library. Robert Kennedy’s writings make vivid how close we came to the brink of war. Had President Kennedy been forced to choose a response in the first 48 hours after an American spy plane discovered the Soviets sneaking nuclear-tipped missiles into Cuba, RFK had no doubt that his brother would have chosen an air strike against the missile sites, followed by an invasion. As he wrote in his notes while discussing this option, “if we go in, we go in hard.”
Allison, Graham. "50 Years After Cuban Missile Crisis: Closer Than you Thought to World War III." The Christian Science Monitor, October 15, 2012.