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WHITEMAN AIR FORCE BASE, Mo. – 2nd Lt. Michael Mealiff, 509th Contracting Squadron, prepares to attach an automated external defibrillator to a training mannequin during a Heartsaver AED course Feb. 10. The Heartsaver AED course teaches rescuers when to phone 911, how to give CPR, how to use an AED and how to provide relief from choking. (U.S. Air Force photo/Senior Airman Stephen Linch)