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File:Huge drop hammers work day and night forming sheet metal parts for United Nations bombers and fighters at the North American Aviation plant, Inglewood, Calif.jpg - Wikimedia Commons
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Robins Air Force Base - Jason Nasworthy, left, and Jamie Shipes, 561st Aircraft Maintenance Squadron sheet metal mechanics, work to replace Longerons on an F-15 aircraft at the Warner Robins Air Logistics
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