Robotic dog unveiled by the US military
12 September 2012 Last updated at 07:26 BST
The US military has unveiled its latest piece of hardware - a robotic dog.
The AlphaDog - developed by the Defense Advanced Research Projects Agency (Darpa) - obeys commands through a touchscreen device.
It can stand upright, walk for 20 miles without a break and carry up to 400lbs.
A video produced by Darpa demonstrates the robot's skills.