Master Sgt. Jennifer Flecker, 9th Physiological Support Squadron support flight chief, runs through the initial process of turning on and preparing a Reduced Oxygen Breathing Device for a hypoxia demonstration at Beale Air Force Base, California, July 21, 2017. The demonstration is meant to mimic a hypoxic environment that a pilot could encounter at high altitudes.

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Size: 1734px × 1154px
Photo credit: © Bob Collet / Alamy / Afripics
License: Licensed
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Keywords: 9th, air, america, archive, armed, army, base, beale, defence, force, forces, military, navy, pspts, reportage, robd, service, serviceman, servicemen, soldier, states, united, usa