Production. Airplane manufacture, general. A girl clerk on the flight ramp of North American's Inglewood, California, aircraft plant, carries dispatches over large areas quickly with a bicycle. This plant produces the battle-tested B-25 ("Billy Mitchell") tested B-25 ("Billy Mitchell") bomber, used in General Doolittle's raid on Tokyo, and the P-51 ("Mustang") fighter plane, which was first brought into prominence by the British raid on Dieppe