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The PackBot from iRobot can climb stairs and carry a camera on its arm. The robot is already being used in Iraq and Afghanistan.
The Dragon Runner, developed by Carnegie Mellon, is a four wheeled mobile ground sensor system that comes with a vehicle that can hit 20 mph, a control system and a handheld controller. The 21 pound vehicle can be activated in three seconds and can be thrown over a wall or around a corner.
Carnegie Mellon University and United Defense Industries built the Gladiator, an unmanned vehicle with remote, unmanned scout, reconnaissance and surveillance capabilities.