A steel girder flak tower in woods by Avril, France, near airfield used by U.S. Army Air Corps , in World War 2. Barrel of 90mm gun seen moving at the top of the tower. A US Army Sergeant standing on the tower with earphones and binoculars. Formation of US fighter planes seen in background, as they start to break for landing at a nearby airfield. U.S. gunners handle packs of 90mm ammunition. A P-38 aircraft seen high above. U.S. B-26 passing overhead and another P-38 in the sky. A C-47 taking off from nearby airfield, and another P-38 overhead.