Battery B, 63rd Coast Artillerymen fire antiaircraft guns at flying targets and break record, in Fort MacArthur, California.

Coast artillerymen fire antiaircraft guns in Fort MacArthur, California. Men on a sea coast. Battery B of 63rd Coast Artillerymen, preparing antiaircraft guns. Flying targets being fired at and targets hit. Antiaircraft guns, mounted on turrets, placed in a line on the coast. Antiaircraft guns fired at flying targets by the coast artillerymen. The flying targets blown into pieces. A few men on the coast, watch. More antiaircraft guns fire at targets, and hit the targets, breaking the record. A few artillerymen prepare tents at night.