Staff Sgt. Shannon Long, 779th Medical Group aerospace and operation technician, maintenance NCO in charge, teaches North Stafford High School Air Force Junior ROTC students about the hypobaric chamber during a tour of the Aerospace and Operational Physiology Flight Training center Dec. 14, 2012. During their visit the students were taught about extensive training pilots must complete to remain on flying status. (U.S. Air Force photo/ Airman 1st Class Erin O’Shea)