Students in the Advanced Contingency Skills Training Course listen to their instructor during patrolling and tactics training for the course Aug. 12, 2008, on a range on Fort Dix, N.J. The course, taught by the U.S. Air Force Expeditionary Center's 421st Combat Training Squadron, prepares Airmen from multiple career fields for upcoming deployments. (U.S. Air Force Photo/Tech. Sgt. Scott T. Sturkol)