Twilight's Last Gleaming

After escaping from a military prison, the rogue Air Force General Lawrence Dell and accomplices Powell, Garvas, and Hoxey infiltrate a Montana ICBM complex that Dell helped design. Their goal is to gain launch control over its nine Titan nuclear missiles. The infiltration does not go as planned, as the impulsive Hoxey guns down an Air Force guard for trying to answer a ringing phone. Dell then shoots and kills Hoxey. The three then make direct contact with the US government (avoiding any media attention) and make their demands: $10 million ransom, and that the President go on national television and make public the contents of a top-secret document.