Security Forces active shooter training
Airman 1st Class Matthew Pachan, 31st Security Forces Squadron defender, stands guard while fellow defenders clear a classroom during an active shooter training exercise at the Aviano Air Base Elementary School, April 19, 2014. The SFS Airmen culminated their weeklong active shooter training with a hands-on exercise that tested their abilities to respond in a stressful situation. The training was made as real as possible with simulated rounds and victims spread throughout the school for the defenders to locate and treat. (U.S. Air Force photo/Tech. Sgt. Eric Donner)