The Atomic Cannon, at 280 mm, was the largest nuclear capable mobile artillery piece manufactured by the United States. On May 25, 1953, a 280 mm cannon fired an atomic projectile a distance of 7 miles at the Nevada Test Site. Twenty 280 mm cannons were manufactured. None were used in battle. (Sound effects added.) SEE MORE ABOUT THE ATOMIC CANNON IN "TRINITY AND BEYOND" and "ATOMIC FILMMAKERS."

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