Students in the Advanced Contingency Skills Training Course walk in a patrol formation during training on a Fort Dix, N.J., range on May 11, 2009. The training, taught by the U.S. Air Force Expeditionary Center's 421st Combat Training Squadron on Fort Dix, prepares Airmen for upcoming deployments. (U.S. Air Force Photo/Tech. Sgt. Scott T. Sturkol)