Ground crewmen of the 91st Bomb Group work on the engines of a B-17 Flying Fortress (serial number 42-5069). Passed for publication 1 Feb 1943. Printed caption on reverse: 'Some of the airmen from America who are taking part in the daily raids on enemy occupied territory and Germany, in their giant high altitude aircraft, the "Flying Fortress", capable of carrying a 10,000 pound bomb load.' Printed caption also attached: 'Photo shows - Ground crew preparing a 'Fortress' for a raid.' On reverse: US Army Press & Censorship Bureau [Stamp]. Print No: 248366.