Security Forces Airmen receive vital training from contingency skills instructor, Staff Sgt. Cecil Evans, in the operation of Blue Force Tracker August 29, 2009, during their pre-deployment training conducted by the 421st Combat Training Squadron at the U.S. Air Force Expeditionary Center, Joint Base McGuire-Dix-Lakehurst, N.J. The Blue Force Tracker is a system that gives air and ground units and their commanders a real-time picture of the battlefield. (U.S. Air Force Photo/Tech. Sgt. Paul R. Evans)