Senior Airman Reid Nixon, left, a 340th Expeditionary Aircraft Maintenance Unit hydraulics journeyman from Odenton, Maryland, and Senior Airman Michael Velazquez, a 340th EAMU hydraulics journeyman from Rochester, New York, join a small team of hydraulics specialists as they install a multi-purpose refueling system on a KC-135 Stratotanker at Al Udeid Air Base, Qatar, Dec. 30, 2015. The system allows the aircraft to refuel any plane supporting Operation Inherent Resolve. (U.S. Air Force photo/Tech. Sgt. James Hodgman)