Some of the more interesting little-known facts concerning B-17s during World War II:
During the attack on Pearl Harbor, the incoming Japanese fighters were first mistaken for a flight of B-17s coming in from California when the attack force was first sighted on radar.
The expected B-17s arrived later during the attack on Pearl Harbor but were low on fuel and could not do much.
One B-17 received eleven twenty-millimeter cannon shells penetrating its fuel tanks, but it never exploded. The aircraft flown by the 379th Bomb Group was later examined and a note was found inside one of the flak shells written in Czech. It said, "This is all we can do for you now." This was one of the first signs of how Germany was using its slave labor.