Robots Lose Balance in LA Challenge

Robots have been competing on a Pentagon obstacle course at the Los Angeles County Fairgrounds.
Team Kaist of South Korea defeated 22 others to win the top $2m (£1.3m) prize from the US Department of Defense's Darpa research unit with its DRC-Hubo humanoid robot. As BBC World TV reports,
Just keeping upright seemed a challenge in itself for some of the metallic competitors.