Public domain
YB-17 bombardment squadron, Langley Field, Virginia. The engines of the mighty YB-17 bombers are always in the pink of condition. This crew of soldier-mechanicas at Langley Field, Virginia is making one of the regular changes of spark plugs that insure peak performance
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Credit lineYB-17 bombardment squadron, Langley Field, Virginia. The engines of the mighty YB-17 bombers are always in the pink of condition. This crew of soldier-mechanicas at Langley Field, Virginia is making o. 1942-01-01. United States. Office Of War Information, Palmer, Alfred T.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.