7 Days In May

The story is said to have been influenced by the right-wing anti-Communist political activities of General Edwin A. Walker after he resigned from the military. An additional inspiration was provided by the 1961 interview by Knebel, who was also a political journalist and columnist, conducted with the newly-appointed Air Force Chief of Staff, Curtis LeMay, an advocate of preventive first-strike nuclear option.

President John F. Kennedy had read the novel and believed the scenario as described could actually occur in the United States. According to Frankenheimer in his director’s commentary, production of the film received encouragement and assistance from Kennedy through White House Press Secretary Pierre Salinger, who conveyed to Frankenheimer Kennedy’s wish that the film be produced and that, although the Pentagon did not want the film made, the President would conveniently arrange to visit Hyannis Port for a weekend when the film needed to shoot outside the White House. 

Info via: Wikipedia

Starring:  Burt Lancaster, Kirk Douglas, Fredric March, Ava Gardner, and 
Edmond O’Brien