Staff Sgt. Travis Parkhurst, combat skills training instructor, shows students in the Combat Airman Skills Training Course 10-1A the proper way to handle a vehicle roll-over in a high-mobility, multi-wheeled vehicle, or HMMWV, during HMMWV egress training in the course on Nov. 11, 2009, at Joint Base McGuire-Dix-Lakehurst, N.J. The CAST course, taught by the U.S. Air Force Expeditionary Center's 421st Combat Training Squadron, prepares Airmen for upcoming deployments. (U.S. Air Force Photo/Tech. Sgt. Scott T. Sturkol)