Built from 1936 to 1945, about 45 intact Boeing B-17 Flying Fortress remain. Today, less than 10 are estimated to still be airworthy. There were 12,731 B-17s produced in total, of which 4,735 were ...

The bulk of the United States' industrial war effort in World War II went into the production of aircraft and naval vessels. The Army's vehicles, like tanks, were a comparatively small part of the ...