Aerospace physiology prepares for takeoff
Technical Sergeant Daniel Kilbride, an aerospace physiology technician with the 779th Aerospace Medicine Squadron, briefs a class before the flight in the altitude chamber at Andrews Air Force Base, Md., on Sep. 1, 2009. The altitude chamber is a training requirement for all personnel on flying status that ensures they can recognize the symptoms of hypoxia and hypobaria. (U.S. Air Force photo by Staff Sergeant Renae L. Kleckner)

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Photo by: Staff Sergeant Renae L. Kleckner |  VIRIN: 090901-F-5234K-013.JPG