U.S. Air Force Staff Sgt. Lane Lucas, 100th Aircraft Maintenance Squadron crew chief, pushes a cart of oxygen tanks after refilling the oxygen supply of a KC-135 Stratotanker aircraft at Royal Air Force Mildenhall, England, Aug. 31, 2021. The 100th AMXS supports the Air Force's global reach mission by maintaining KC-135s, which provide air refueling capabilty throughout Europe and Africa. (U.S. Air Force photo by Senior Airman Joseph Barron)