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 B-17 Flying Fortress was one of the main offensive weapons used during WWII. Here's who designed and built it, and where they were made.