Production. P-51 "Mustang" fighter planes. The accuracy of a milling machine operation is checked by an inspector in a machine shop at the Inglewood, California, plant of the North American Aviation. The casting being milled will be part of the landing gear of a P-51 fighter plane. This plant produces the battle-tested B-25 "Billy Mitchell" bomber, used in General Doolittle's raid on Tokyo, and the P-51 fighter plane which was first brought into prominence by the British raid on Dieppe