DARPA's Robotic Cheetah

If you're a soldier pursuing an enemy, wouldn't you like to be able to tell a fast-running robot to "fetch?" The Defense Advanced Research Projects Agency (DARPA) thinks so, too. The Cheetah will have four legs, an articulated head, and a flexible spine. This will be a proof of concept model, not an operational weapon, but think of the advances in robotics we've seen in recent years.