Carlos Casasola, 12th Maintenance Group metals technology shop, machinist, forms a flat surface on a block of metal using a vertical milling machine, July 2, 2018, at Joint Base San Antonio-Randolph, Texas. The maintenance group executes more than 40,000 flight hours annually supporting six training operations squadrons. (U.S. Air Force photo by Tech. Sgt. Ave I. Young)

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Photo by: Tech. Sgt. Ave I. Young |  VIRIN: 180702-F-WG850-0002.JPG