Visible crew/equipment: In the scene where Dan is being attended to by the crew after he has been hit you can clearly see that it is a prosthetic arm that they are holding up and not Dan's.
Visible crew/equipment: During the take-off sequence, in a close-up showing a ground crewman pulling the chock away from the front of a tire, production crew and a van can be glimpsed in the far distance out of focus before being obscured by more period accurate vehicles and extras.
Chosen answer: It would seem that every plane's Norden bombsight would drop from different angles, etc., each designated for a common target. So, 2 planes could be higher, lower, ahead or behind the target and each hit the target, if the bombadiers had an accurate fix on the target.