The Mystery of Pittsburgh's “Ghost Bomber” - Heinz History Center
History of US Air Force Bombers B-17, B-24, B-29, B-52, B-1, B-2, B-21
728 × 410] The Boeing B-17 Flying Fortress, was a legendary American ww2 heavy bomber designed in 1930. It dropped over 640,000 tons of bombs on Nazi Germany. 12,731 b17 were built