Intelligence officers -- 5 Intelligence service -- 4 Americans -- 1 Autobiographies 1 Biographies 1 Biography -- 1 Dictionaries -- 1 more ... Espionage, American -- 1 Fiction 1 Fiction -- 1 Foreign relations -- 1 History. -- 1 Intelligence officers 1 Internal security -- 1 Law enforcement 1 National security -- 1 Officials and employees 1 Secret service -- 1 Terrorism 1 World War, 1939-1945 -- 1 less ...