Trivia: During the attack, when the guys are in the control tower waiting for Danny and Rafe to lead the Japanese planes past them, one man says, "I'm cocked and locked." The phrase is also used during the Doolittle raid. The expression is unique to the Colt government-model .45 cal. semi-auto pistol and its clones. It means the hammer is cocked, but the safety is ON; it is how you carry a loaded .45 so it won't go off accidentally. A "cocked and locked" weapon CANNOT be fired.
Trivia: Despite the numerous historical errors and gaffs in the movie, the only historical "fact" the filmmakers managed to do research on (and admit to supposedly) is that they consulted bottle collectors on what types of bottles to use during the battle scenes to administer blood.