U.S. Air Force Staff Sgt. Brian Campbell and Joseph Upchurch, firefighters for the 145th Civil Engineer Squadron, use a high pressure fire hose to simulate putting out a fire during the 145th Airlift Wing’s annual anti-terrorism exercise simulating a car bomb detonation inside the perimeter of the North Carolina Air National Guard Base, Charlotte Douglas International Airport, Nov. 1, 2014. The exercise initiated force protection measures across the base and tested the Wing’s ability to respond accordingly. (U.S. Air National Guard photo by Senior Airman Laura J. Montgomery, 145th Public Affairs/Released)