Soldiers test skills
Soldiers from the 100th Missile Defense Brigade (Ground-based Midcourse Defense) utilize the Engagement Skills Trainer 2000 for weapons familiarization on Fort Carson, Colo. The EST 2000 works by connecting air hoses driven by a compressor and laser beams to simulate bullet trajectory and can simulate dozens of different scenarios in virtual combat. (Army photo by Sgt. Joseph Ten Eyck)