Matt Marshall, a Ph.D. student in the Georgia Tech School of Mechanical Engineering, uses a joystick controller based on visual servoing to command the motions of a robotic arm (with a 3-D camera attached) to grasp a cup. Shown left to right are Michael Matthews, a GTRI research engineer; Gary McMurray, a GTRI division chief; Marshall; and Ai-Ping Hu, a GTRI research engineer. (Georgia Tech Photo: Gary Meek)