U.S. Air Force Tech. Sgt. Jason Flowers, 325th Logistics Readiness Squadron noncommissioned officer in charge of fuel distribution, conducts a quality control test on liquidized oxygen at Tyndall Air Force Base, Florida, Dec. 7th, 2021. The quality control test ensures that pilots and air crews are provided with safe breathing oxygen when conducting missions at high altitudes. (U.S. Air Force photo by Airman 1st Class Anabel Del Valle)