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U.S. Air Force Staff Sgt. Skylar Frias, 18th Logistics Readiness Squadron cryogenics technician, transfers liquid oxygen in a beaker for an odor test at Kadena Air Base, Japan, June 16, 2022. An odor test ensures the liquid oxygen is still in good quality for use by aviators in high altitudes. Liquid oxygen has to be at least 99.5 percent pure oxygen in order for it to be used. (U.S. Air Force photo by Airman 1st Class Sebastian Romawac)
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