My dad told me a story about WW-II. He flew as a tail gunner on B-17s for the 96th Bomb Group of the 8th Army Air Corps. Apparently another bomb group, the 100th I believe, was being shot up quite badly by German fighters and lowered their wheels to indicate surrender. When the fighters came alongside to escort the surviving bombers to their future internment camp the gunners shot the fighters out of the sky. After that the group didn't get cut a lot of slack by the German fighters.

The 100th took the heaviest casualties of WW-II due to this. I may be wrong on the Bomb Group but I know it happened.

Steve