National Geographic : 1945 Feb
U.S.Army Air Forces, Official Ten China Based B-29's Are Gassed and Bombed Up for Their First Raid on Yawata Steel Mills Near Moji, Japan More than 400,000 native farmers helped build the Army Air Force bases in China. With four motors, aggregatingmore than 8,800 horsepower, Superfortresses carry a crew of eleven, including six gunners and a bombardier. Look at that "poisonous stingare'e" tail gun sticking outbehind! Pressurized cabins permit the crew to work at 40,000 feet without suffering from cold or using oxygen masks. Portable oxygen tanks are available, should the men have toparachute from extreme heights. Here a Chinese soldier stands guard with a gun, while other Chinese and Americans roll barrels about and finish a drainage ditch.