1st. Lt. Seth Klint, 28th Contracting Squadron officer in charge of the construction flight, places AED pads on a practice dummy during a CPR and AED class in the 28th Medical Group education and training room at Ellsworth Air Force Base, S.D., Sept. 11, 2013. The curriculum of the class included step-by-step instructions on how to operate a defibrillator, treat individuals who are choking and perform CPR. (U.S. Air Force photo by Airman 1st Class Hrair H. Palyan/Released)