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Senior Airman Heather Uman, 359th Aerospace Medicine Squadron aerospace and operational physiology flight technician, fits an oxygen mask Aug. 6, 2015, at Joint Base San Antonio-Randolph. As a 359th AMDS Operational Physiology Flight technician Uman teaches flight crewmembers how cabin pressurization works, how eyes dark-adapt, emergency equipment, parachutes, how to inspect equipment and basic survival techniques to survive a plane crash.
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