U.S. Air Force Capt. Anthony Francisco, 18th Medical Group executive officer and aerospace and operational physiology flight officer in charge, prepares to "fly" the altitude chamber while U.S. Air Force Staff Sgt. Nazareth Oliver, 18th Aerospace Medicine Squadron aerospace and operational physiology flight NCO in charge of maintenance, briefs students within the chamber on Kadena Air Base, Japan, June 11, 2013. The altitude chamber is designed to simulate students flying to 25,000 feet in altitude and familiarize them with the symptoms associated with a lack of oxygen. (U.S. Air Force photo by Airman 1st Class Hailey R. Davis/Released)
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