U.S. Air Force members of the 145th Force Support Squadron, cover a mannequin as part of search and recovery team duties during an 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 mannequin is used to simulate human remains ejected from the car-bomb detonation. (U.S. Air Force photo by Senior Airman Julianne M. Showalter, 145th Public Affairs/Released)