U.S. Soldiers assigned to the 11th Quartermaster Company prepare for a mass casualty exercise after receiving a mock alert at the 11th Quartermaster headquarters building in Fort Bragg, N.C., March 20, 2013. Soldiers of the 82nd Sustainment Brigade provided a security perimeter for Womack Army Medical Center 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)