Boeing B-17F Published on October 14, 2012 in 14 October 1943: “Black Thursday”Full resolution (1800 × 1435) Next → B-17 Flying Fortresses attack Schweinfurt, Germany, 1943. (U.S. Air Force) Boeing B-17F formation over Schweinfurt, Germany, on Aug. 17, 1943. (U.S. Air Force photo)