FORTRESS OVER BERLIN, but not a new German defense, nor is it there to protect the Nazi capital. Its mission is quite the opposite. This B-17 Flying Fortress of the 8th A.F. is there to unload its lethal load of destruction on the capital city of Nazi Germany, in the daylight attack on Berlin April 29th.

The 452nd Bomb Group lost 3 B-17s that day:
https://b17flyingfortress.de/en/b17/status-date/29-04-1944/bg/452nd-bomb-group/