Master Sgt. Joseph Feiss, 100th Logistics Readiness Squadron noncommissioned officer in charge of fuels environmental safety office, closes the valves to underground fuel tanks as Mike Wilson, Defense Logistics Agency quality assurance representative, watches Jan. 27, 2020, at RAF Mildenhall, England. Petroleum, oil and lubricants Airmen from RAF Mildenhall power the only aerial refueling wing for United States Air Forces in Europe and Air Forces Africa. (U.S. Air Force photo by Airman 1st Class Joseph Barron)