Each year, instructors from the 28th Medical Group education and training office hold more than 20 CPR and AED classes at Ellsworth Air Force Base, S.D., Sept. 11, 2013. The class is designed to teach and re-qualify Airmen with heart and life saving skills in an effort to reduce preventable incidents both on and off base. (U.S. Air Force photo by Airman 1st Class Hrair H. Palyan/Released)