“If the CIA did find out what we were doing [talks toward normalizing relations with Cuba], this would have trickled down to the lower echelon of activists, and Cuban exiles, and the more gung-ho CIA people who had been involved since the Bay of Pigs….I can understand why they would have reacted so violently. This was the end of their dreams of returning to Cuba, and they might have been impelled to take violent action. Such as assassinating the President.”
— Former U.S. diplomat at the UN William Attwood, quoted in Anthony Summers’ Not in Your Lifetime. Attwood was selected by President Kennedy to explore a rapprochement with Castro in the fall of 1963.