June 3, 2021 USAF Marathon History and Heritage Race Series features the B-17 Flying Fortress for July WRIGHT-PATTERSON AIR FORCE BASE, Ohio – Soaring in as the fourth historical aircraft to be highlighted for the History and Heritage Race Series is the B-17 Flying Fortress, beginning July 1.As the second most produced bomber in United States Air Force history, the retired B-17 aircraft is one of the