Staff Sgt. Bryan White, 23d Logistics Readiness Squadron (LRS) fuels facilities NCO in charge, checks the gauge on a liquid oxygen (LOX) tank Oct. 30, 2019, at Moody Air Force Base, Ga. LOX is used as a continuous supply of breathable air to pilots and aircrew at high altitudes. The 23d LRS fuels facilities Airmen fill tanks, take samples of LOX and conduct odor tests to evaluate its purity. (U.S. Air Force photo by Airman Azaria E. Foster)