Senior Airman Deaja Ellis, 359th Aerospace Medicine Squadron aerospace and operational physiology technician, explains hypoxia symptoms during cabin decompression Jan. 28, 2020 at Joint Base San Antonio-Randolph, Texas. The hypobaric chamber simulates pressure conditions at a variety of altitudes to help aviators experience hypoxia, a lack of oxygen, so they can better identify it and respond to cabin decompression while airborne to prevent aircraft mishaps. (U.S. Air Force photo by Tech. Sgt. Katherine Spessa)

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