Virginia Air National Guard Tech. Sgt. Michael Trahant, 192nd Maintenance Squadron aerospace propulsion technician, uses a computer system to perform an engine test run inside a “hush house” at Langley Air Force Base, Va., July 22, 2015. The system provides readings from the test and submits codes to determine faults within the engine. (U.S. Air Force photo by Senior Airman Kayla Newman/Released)
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