PETERSON AIR FORCE BASE, Colo. - Airman 1st Class Andrea Cañas, a dental laboratory technician from the 21st Dental Squadron, files down high points on a retainer at the Dental Lab at Peterson Air Force Base, Colo., Sept. 12, 2016, to fit properly when worn. Cañas was born in the U.S., but was raised in El Salvador. (U.S. Air Force photo by Philip Carter)
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