After a tough mission Colonel Gallagher needs a new gunner, Corporal Corbett is a replacement and has a perfect gunnery score of 1000; even TSgt. Komansky only scored 400. On a mission Corbett spots the target, but his gun jams. Komansky adopts Corbett and helps him. Corbett spots a real German FW and shoots it down. He gets promoted to Sergeant but is upset because he then realizes he has killed someone.