U.S. Air Force Senior Airman Edgar Luna, 353rd Special Operations Aircraft Maintenance Squadron aerospace propulsion journeyman, prepares an AE2100D3 Rolls Royce engine for an engine swap procedure Aug. 6, 2020, at Kadena Air Base, Japan. The maintenance crews can change MC-130J Commando II engines in a matter of hours, ensuring the aircraft remains ready to support any contingency, disaster response, or humanitarian aid. (U.S. Air Force photo by Staff Sgt. Peter Reft)