LANGLEY AIR FORCE BASE, Va. -- Airman 1st Class Brendan Davis, an Aerospace Physiology Apprentice with the 1st Aerospace Medicine Squadron, gives instruction to U.S. Coast Guard Aviation Maintenance Technician students from Elizabeth City, N.C., Coast Guard Station in the altitude chamber during chamber training on March 23. While in the altitude chamber students are exposed to atmospheric conditions at 25,000 feet. Without the aid of an oxygen mask they experience symptoms of hypoxia, an oxygen deficiency of the tissue and blood cells that causes impairment of function at high altitudes. (U.S. Air Force photo by Staff Sgt. Samuel Rogers)
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