Tanker maintenance
U.S. Air National Guard Tech. Sgt. Michael Baldrige, an aircraft hydraulics systems specialist with the 121st Air Refueling Wing, fixes the hydraulics on the refueling system of a KC-135 Stratotanker April 12, 2018 in Hagar 885 at Rickenbacker Air National Guard Base, Ohio. The KC-135 provides the core aerial refueling capability for the United States Air Force. (U.S. Air National Guard photo by Airman 1st Class Tiffany A Emery)