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U.S. Air Force Staff Sgt. David Humphreys and Senior Airman Nathan Hiesterman, 6th Aircraft Maintenance Squadron aerospace propulsion journeymen, inspect a KC-135 Stratotanker aircraft engine at MacDill Air Force Base, Fla., Nov. 6, 2018. This type of inspection ensured this KC-135 was safe to fly and mission ready. (U.S. Air Force photo by Airman 1st Class Scott Warner)
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