From chat. Thanks Arrows of War

🌎 Sioux Falls, South Dakota, USA

A different perspective. Returning aircraft were heavily damaged in bombing raids. The Brit’s looked at the areas with damage and beefed up those areas. Then it dawned on them… the ones returning had survived being shot in those places. The places that needed reinforcement were the places airplanes that didn’t return had been shot.

Oldie but a goodie. Hold your sack out of the way.

https://youtu.be/u18v5aSsk_8