B-17 action is near the beginning and (mostly) the end, featuring film I've seen before of 42-102588 doing lifeboat drops - either this is stock footage, or this movie is where the stock footage came from. Also some good shots of ASR OA-10s and C-47s. Any guesses on the filming location?
Two B-17s show up earlier; this one has an armed chin turret and nose art MICKY: