U.S. Air Force Tech. Sgt. Timothy Andrews, NCO in charge of fixed facilities with the 1st Special Operations Logistics Readiness Squadron, displays a liquid oxygen sample at Hurlburt Field, Florida, Aug. 26, 2020. Air Commandos with the 1st Special Operations Logistics Readiness Squadron collect samples of liquid oxygen and test the odor of each to ensure all oxygen delivered to 1st Special Operations Wing aircraft is safe for aircrew members. (U.S. Air Force photo by Staff Sgt. Joseph Pick)