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SCOTT AIR FORCE BASE, Ill. -- Master Sgt. David Baker, 375th Aeromedical Evacuation Squadron flight chief, explains some of the characteristics of the C-21 aircraft to retired Senior Master Sgt. Thomas Gray, at the 375th Operations Group Back-to-School Bash inside Hangar 1.(U.S. Air Force photo by Airman 1st Class Wesley Farnsworth)