North American's B-25G Mitchell North American's B-25G Mitchell from the AAF TAC Center, Orlando Florida. April 17, 1944. The crew of the B-25G was five--pilot, copilot, navigator/cannoneer, upper turret gunner, and radio operator. Since there was no bombardier, the pilot fired the nose armament and released the bombs. The radio operator also doubled as the ventral turret gunner when this turret was fitted. This model carry a 75mm gun into the nose.