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U.S. Air Force Senior Airman Dorian Longmire, a 379th Logistics Readiness Squadron petroleum oil lubricants specialist, purges a hose of liquid oxygen during a quality control test Aug 11, 2022 at Al Udeid Airbase, Qatar. Liquid oxygen is used in aircraft and breathing apparatus’s for aircrew. (U.S. Air National Guard photo by Master Sgt. Michael J. Kelly)
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