I remember films like this. Of course, being a little younger than this film, the scare was more hydrogen bombs. My grade school years were in the shadow of the Cuban missile crisis. By that time, thermonuclear weapons made the idea of Duck and Cover kind of silly.
Behind Enemy Lines is a 1986 American action film directed by Gideon Amir and starring David Carradine. It is set in the context of the Vietnam War POW/MIA issue where Colonel Cooper, an Airborne commando is sent to Vietnam to free American soldiers, caught in a Vietnamese prisoner of war camp. The film is also known as Attack Force ‘Nam and P.O.W. the Escape.