Production. Airplane manufacture, general. Preparing an experimental scale model of the B-25 bomber for the wind tunnel tests in the Inglewood, California, plant of North American Aviation, Incorporated. The model maker is adjusting the empennage to its correct position. 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