A U.S. Soldier assigned to the 11th Quartermaster Company stands guard outside Womack Army Medical Center during a mass casualty exercise at Fort Bragg, N.C., March 20, 2013. Soldiers of the 82nd Sustainment Brigade provided a security perimeter for Womack and the U.S. Army Forces Command headquarters building as part of the exercise. (U.S. Army photo by Sgt. 1st Class Vin Stevens/Released)