Original Date: 1957
Subject: Marines of the 4th provisional atomic exercise brigade jump off in an advance of the war games that followed
detonation of the largest atomic bomb ever touched off in the U.S. at the Nevada Test Site yesterday morning. The marines
were in trenches 5,700 yards from ground zero during the test. Helicopters in background took part in the exercise.
There were no casualties although the shock of the blast caved in some trenches.