Boeing B-17G Published on October 14, 2012 in 14 October 1943: “Black Thursday”Full resolution (1350 × 914) ← Previous Next → A Boeing B-17G Flying Fortress with its bomb bay doors open. (U.S. Air Force) Boeing B-17G with bomb bay doors open over Berlin. This aircraft belongs to the 452nd Bomb Group. (U.S. Air Force photo)