Tech. Sgt. John Barker, 931st Maintenance Squadron air reserve technician, carefully measures a piece of sheet metal before running it through a metal slicer at McConnell Air Force Base, Kan., Jan. 22, 2015. Barker, who works in the Aircraft Structural Maintenance Shop, is helping upgrade the galleys used in the KC-135 Stratotankers. (U.S. Air Force photo by Tech. Sgt. Abigail Klein)
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