The chance of enemy confrontation by sea, tank, or air battle is small, but terrorist networks operating in the shadows will likely challenge the U.S again. Instead of waiting to react, the military’s new mission is to detect, deter, and defend America from terrorist attack. We examine cutting-edge technology that leads the fight in this new battle landscape, including Smart Bombs, Tactical Ballistic-Missile Systems, GPS-driven technology, Electro-Optical Systems, and the pilotless drone Predator.