Public domain
Member[s] of the experimental staff at the North American Aviation, Inc., plant, observe wind tunnel tests on an accurate scale model of the B-25 ("Billy Mitchell") bomber, Inglewood, Calif. This plant produces the battle-tested B-25 bomber, used in General Doolittle's raid on Tokyo, and the P-51 Mu
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Credit lineMember[s] of the experimental staff at the North American Aviation, Inc., plant, observe wind tunnel tests on an accurate scale model of the B-25 ("Billy Mitchell") bomber, Inglewood, Calif. This plan. 1939-01-01. Palmer, Alfred T.. FSA/OWI Color Photographs, Library of Congress. Public domain.