American bombers raid targets in Germany.
Full title reads: "GREAT U.S. AIR ASSAULT".
Ground to air shots of the American B.17 bomber planes in flight. Air to air shots of the bombers over German and East Prussian targets. They move through heavy flak. Aerial bombing of Marienburg in East Prussia and the Schweinfurt in Germany. The bombers' gunners intercept German fighter planes and one is seen heading down for a crash - various shots of the air battle. Crew talking after returning to base.
(Mute & Track Negs.)