U.S. Air Force Airmen from the 165th Airlift Wing, Georgia Air National Guard respond to an active shooter during an exercise created to test first responders, Sept. 12, 2013 at Savannah Air National Guard Base in Garden City, Ga. 165th Security Forces contained the simulated shooter prior to the arrival of Emergency Medical Service personnel. (National Guard photo by Tech. Sgt. Charles Delano/released)