Master Sgt. Eric Icenhower, 141st Air National Guard Survival Evasion Resistance and Evasion liaison, gives the thumbs-up before starting a simulation on the Reduced Oxygen Breathing Device June 26, 2017, at Fairchild Air Force Base, Washington. The ROBD can simulate high altitude atmospheric pressures to induce a controlled state of hypoxia in trainees. ( Air Force photo by Airman 1st Class Ryan Lackey)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: afb, airmen, fairchild, hypoxia