Fiction Ryan, Jack (Fictitious character) Intelligence service Ryan, Jack, Sr. (Fictitious character) Prevention Terrorism Adventure stories Prisoners of war Spy stories Terrorists Armored vehicles, Military Clark, John (Fictitious character) Imaginary wars and battles Intelligence officers Presidents Special forces (Military science) World War III World politics Aerial operations, American Aircraft carriers Americans Assassination Attempted assassination Aviation Biography Children of presidents Commando troops Computer networks Crisis management in government Design and construction