New U.S. anti-aircraft gun. American crewmen fire a 120-mm. gun, the U.S.

New U.S. anti-aircraft gun. American crewmen fire a 120-mm. gun, the U.S. Army's newest and biggest anti-aircraft weapon, at an artillery training center range on the U.S. Atlantic Coast. The new gun can fire its 50-pound projectile approximately 12 miles into the air, or about twice the ceiling of present-day planes. It can be operated either manually by the crew or by remote control.