John F. Kennedy

Jackie became pregnant for the first time in 1955 but after three months "suffered a miscarriage and learned that carrying and delivering a child would always be difficult for her," recalled JFK's friend and adviser Ken O'Donnell.

It was June of 1961, and the setting was neutral Vienna. This first and last Kennedy-Khrushchev summit would prove to be one of the most explosive and decisive meetings ever of the two most powerful leaders of their time.