It''s the spring of 1939, and the prospect of war in Europe looms large. The United States has no intelligence service. In Washington, D.C., President Franklin Roosevelt may run for an unprecedented third term and needs someone he can trust to find out what the Nazis are up to. His choice: John F.Kennedy. It''s a surprising selection. At twenty-two, Jack Kennedy is the attractive but unpromising second son of Joseph P. Kennedy, Roosevelt''s ambassador to Britain (and occasional political..