Air Force Tech. Sgt. Wesley May, a 6th Aircraft Maintenance Squadron aerospace propulsion specialist, inspects an auxiliary power unit on a KC-135 Stratotanker, Jan. 23, 2020, at MacDill Air Force Base, Fla. Aerospace propulsion Airmen are responsible for ensuring the proper operation of all aircraft engine components including fuel, oil, electrical and airflow systems. ( Air Force photo by Airman 1st Cl ass Shannon Bowman)

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