Production. B-25 "Billy Mitchell" bombers. The nacelle of a B-25 bomber is assembled on the center section at the North American Aviation plant at Inglewood, California. In addition to the battle-tested B-25 "Billy Mitchell" bomber, used in General Doolittle's raid on Tokyo, this plant produces the P-51 "Mustang" fighter plane which was first brought into prominence by the British raid on Dieppe