1 The LS3 has stereo, color, and infrared cameras, which allow it to detect obstacles, create 3-D maps of terrain, and follow patrols. 2 Each of its four articulated legs use hydraulic actuators to power the joints. A control system enables the robot to maintain balance and ground contact. 3 Voice recognition allows troops to directly operate the robot. The mule’s gait ranges from a one-mile-per-hour walk to a seven-mile-per-hour run.