As President, John F. Kennedy was the ultimate arbiter of American foreign and millitary policy. But there were still a number of former presidents he could consult with, including President Dwight D. Eisenhower. In this phone conversation, Kennedy asks Eisenhower what he believes the chances are that Russia would launch a nuclear weapon if the United States invaded Cuba. This conversation is a part of the new collection "Listening In: The Secret White House Recordings of John F. Kennedy," available in stores now: bit.ly/RcGzgP