Public domain
Final adjustments are made on the motor of a North American P-51 fighter before it is given its initial test flight. Plant protection officers are always on guard in all parts of the plant, particularly in this area
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Credit lineFinal adjustments are made on the motor of a North American P-51 fighter before it is given its initial test flight. Plant protection officers are always on guard in all parts of the plant, particular. 1942-01-01. Palmer, Alfred T.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.