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Senior Airman Donnell Johnson, 59th Medical Logistics and Readiness Squadron biomedical equipment technician, uses a multimeter to check voltage on a circuit board during a service call Nov. 17 at the U.S. Air Force Post Graduate Dental School on Joint Base San Antonio-Lackland, Texas. A biomedical equipment technician ensures medical equipment is serviceable, safe and properly configured to meet the wartime and peacetime missions of the Air Force Medical Service. (U.S. Air Force photo/Staff Sgt. Jason Huddleston)
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