Boeing B-17 Flying Fortress NAN10-50.jpg|thumb|B-17 modified for testing of the [[Pratt & Whitney T34|XT-34 turboprop]]. When testing concluded, the aircraft was restored to stock configuration as the "[[Liberty Belle (B-17)|Liberty Belle]]", but was lost in a post-forced-landing fire near [[Oswego, Illinois]] on 13 June 2011.]] [[Category:Boeing aircraft|B-17 Flying Fortress]] [[Category:United States bomber aircraft 1930–1939]] [[Category:Four-engined tractor aircraft]] [[Category:Low-wing aircraft]] [[Category:World War II bombers of the United States]] [[Category:Boeing B-17 Flying Fortress| ]] [[Category:Aircraft first flown in 1935]] Boeing B-17 Flying Fortress The Boeing B-17 Flying Fortress is a four-engined heavy bomber developed in the 1930s for the United States Army Air Corps (USAAC). Competing
II Bomber Command along the pacific northwest coast (until May 1943) Wings Groups II Bomber Command The II Bomber Command is an inactive United States Army Air Forces unit. It was last assigned to Second Air Force, based at Fort George Wright, Washington. It was inactivated on 6 October 1943. During World War II, the unit trained large numbers of B-17 Flying Fortress and B-24 Liberator bombardment groups. It controlled operational training units (OTU) and replacement training units (RTU) primarily in the west and southwest of the United States until late 1943 when its operations were taken over by Headquarters, Second Air Force