Tech. Sgt. Troy Colen (center), combat skills instructor, demonstrates tactics to students in the Combat Airman Skills Training Course 10-1A during military operations in urban training in the course on Nov. 5, 2009, at Joint Base McGuire-Dix-Lakehurst, N.J. The course, taught by the U.S. Air Force Expeditionary Center's 421st Combat Training Squadron, prepare Airmen for upcoming deployments. (U.S. Air Force Photo/Tech. Sgt. Scott T. Sturkol)