Production. Airplane manufacture, general. A skilled jig builder lines up a metal plate prior to cutting it to the correct contour. Employed at the Inglewood, California, plant of North American Aviation, Incorporated. This plant produces the battle 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