Martin Caidin's Black Thursday: The Story of the Schweinfurt Raid tells of the United States Air Force's massive bombing raid into Nazi Germany's industrial heartland on Thursday, October 14, 1943. On that fateful day two hundred and ninety one hulking B-17 Flying Fortresses - escorted by squadrons of nimble P-47 Thunderbolts - miraculously fought their way through swarms of Messerschmitt Me-109's, Focke-Wulf FW-190's, Heinkel He-113's and more on their way to cripple the enemy's vital ball-bearings plant at Schweinfurt.