U.S. Air Force Tech. Sgt. Jason Miller, 27th Special Operations Maintenance Operations Squadron, explains components of an Automated External Defibrillator to his class in a training detachment at Cannon Air Force Base, N.M., Feb. 8, 2012. The CPR course is required every two years for the 27th Special Operations Maintenance Group. (U.S. Air Force photo by Airman 1st Class Alexxis Pons Abascal)