One layer at a time
                Senior Airman John McKenzie, 4th Equipment Maintenance Squadron aircraft structural maintenance journeyman, fabricates metal on Seymour Johnson Air Force Base, N.C., Feb. 12, 2010. To fabricate sheet metal he uses a sanding machine to trim it down and make the edges smooth. McKenzie is from Roseville, Calif. (U.S. Air Force photo/Senior Airman Ciara Wymbs)
                
                    
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