Staff Sgt. Samantha Brown, 919th Operations Support Squadron, discusses rescue breathing procedures she will be using on a mannequin during training to receive her cardiopulmonary resuscitation certificate at Duke Field April 13. The course was one of more than a dozen mass training events held during the 919th Special Operations Wing's annual four-day Super Unit Training Assembly. (U.S. Air Force photo/Tech. Sgt. Cheryl Foster)