Production. B-25 "Billy Mitchell" bombers. A year ago this woman was keeping house; today she is doing her part in the war effort by helping build B-25 bombers at North American Aviation's Inglewood, California, plant. 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