Senior Airman Kristin Listien, a physiology technician (PT) assigned to the 19th Aerospace Medicine Squadron High Altitude Airdrop Mission Support Center (HAAMSOC), Little Rock Air Force Base, Ark., prepares for a static-line parachute jump, Nov. 16, 2016. Listien is part of the HAAMS mission where Airmen are specially trained to provide in-flight physiological support to aircrews, special operations forces, high-altitude parachutists, and other agencies that perform unpressurized airdrop operations at 20,000 feet mean sea level and above.

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Photo credit: © Apple White / Alamy / Afripics
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