U.S. Air Force Staff Sgt. Jamie Chambers, 145th Security Forces Squadron, stands vigilant, guarding the perimeter of the base during an Anti-Terrorism Exercise, held Nov 1, 2014, at the North Carolina Air National Guard base, Charlotte Douglas Intl. Airport. The annual Anti-Terrorism Exercise simulated a car-bomb detonation inside the perimeter of the air base. 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 Master Sgt. Patricia F. Moran, 145th Public Affairs/Released)