Sailors from a U.S. Navy Expeditionary Combat Camera unit prepare to exit the Humvee Egress Assistance Trainer, or HEAT, at Fort Eustis, Va., Feb. 27, 2013. Simulation technology is beginning to take a major role in military training, and the Department of Defense is turning to simulation equipment because it places Service members in scenarios to make real-life decisions without putting them in harm’s way. (U.S. Air Force Photo by Airman 1st Class R. Alex Durbin/Released)