Production. Airplane manufacturers, general. Overlooking the Inglewood, California airport of North American Aviation, Incorporated, the secretary in the contract test flight office records the takeoff and landing times of all the planes put through routine flight tests by company pilots. This plant produces the battle-tested B-25 "Billy Mitchell" bomber used in General Dolittle's raid on Tokyo and the F-51 "Mustang" fighter plane which was first brought into prominence by the British raid on Dieppe