Staff Sgt. Ryan Feeney, 340th Expeditionary Aircraft Maintenance Unit crew chief, inspects the hydraulic system on a KC-135 Stratotanker June 1, 2016, at Al Udeid Air Base, Qatar. The hydraulic system on the KC-135 encompasses almost every system, to include landing gear, hydraulic steering, aircraft brakes and flight control. Feeney is attached to the 379th Air Expeditionary Wing and hails from Bangor Air National Guard Base, Maine. (U.S. Air Force photo by Technical Sgt. Carlos J. Trevino/Released)