Twilight's Last Gleaming — Walter H. Wager

A terrifying novel of political conspiracy and basis for the movie starring Joseph Cotten, from the bestselling author of Time of Reckoning and Telefon.
 
A retired general takes over a missile silo in the Badlands. His threat is to provoke a world war, launching deadly ordnance, unless the president is willing to reveal everything about a secret meeting he had during the Vietnam War.
 
The situation is explosive, and so is the truth. Before the day is done, one man has his only shot at redemption -- and countless lives hang in the balance.