U.S. Air Force Capt. Reginald Brown, 86th Aeromedical Evacuation Squadron, gives U.S. Air Force Academy cadets a tour of a C-21, one of the aircrafts used to medevac patients here at Ramstein Air Base, Germany, June 16, 2009. The cadets are participating in Operation Air Force, a summer program which provides exposure to real-world Air Force base environments and prepares the cadets for the transition from academy life to active duty. (U.S. Air Force photo by Staff Sgt. Chenzira Mallory)