World War II military action: bombers taking off and dropping bombs; explosions and smoke; aerial views bombing of German city

Planes lined up on airfield, hangar to right / planes on airfield, propellers turning / bomber taking off, two planes with Army Air Force emblem in bg / side view plane taking off, officers in fg / probably B-17 bomber taking off and flying over camera / various shots bombers flying over French countryside / various shots bombers taking off / looking down on bombers in sky / various shots bombers in sky / B-24 bombers in sky, can see black puffs of enemy flak / planes in air / looking at back of bomber's gunner firing machine gun / plane in sky being hit and exploding / planes in sky / gunfire coming from bomber's tail / plane in sky, maybe parts flying off / plane falling in bg, plane wing in fg / planes in bg with maybe dawn sky and clouds, wing in fg / plane exploding / planes and flak / plane dropping bombs / looking down on bombs dropping on German city / bombs dropping, pan up to bomber plane / looking down on city, smoke rising from explosions, bombs falling in fg / aerial view explosions and smoke on ground / aerial view bombs falling toward ground / bombers dropping bombs / various shots aerial view city with billowing smoke / Note: exact day not known