The Team KAIST DRC-Hubo robot completes the plug task before winning the finals of the Defense Advanced Research Projects Agency (DARPA) Robotic Challenge in Pomona, California June 6, 2015. Twenty-four teams are competing to win a portion of a $3.5 million prize by operating humanoid robots across a task and obstacle course. REUTERS/Patrick T. Fallon 

The Team KAIST DRC-Hubo robot completes the cutting task before winning the finals of the Defense Advanced Research Projects Agency (DARPA) Robotic Challenge in Pomona, California June 6, 2015. Twenty-four teams are competing to win a portion of a $3.5 million prize by operating humanoid robots across a task and obstacle course. REUTERS/Patrick T. Fallon TPX IMAGES OF THE DAY

Team Tartan Rescue's CHIMP (CMU Highly Intelligent Mobile Platform) robot turns a valve during the finals of the Defense Advanced Research Projects Agency (DARPA) Robotic Challenge in Pomona, California June 6, 2015. Twenty-four teams are competing to win a portion of a $3.5 million prize by operating humanoid robots across a task and obstacle course. REUTERS/Patrick T. Fallon 

The Jet Propulsion Lab team's RoboSimian robot turns on a valve at a simulated disaster-response course during day one of the Defense Advanced Research Projects Agency (DARPA) Robotics Challenge finals in Pomona, California, June 5, 2015. The DARPA-sponsored event has drawn robotic teams from around the world to compete on a series of eight challenges throughout the course. REUTERS/David McNew TPX IMAGES OF THE DAY

A member of Team KAIST DRC-Hubo celebrates after completing their run in the finals of the Defense Advanced Research Projects Agency (DARPA) Robotic Challenge in Pomona, California June 6, 2015. Twenty-four teams are competing to win a portion of a $3.5 million prize by operating humanoid robots across a task and obstacle course. REUTERS/Patrick T. Fallon 

Jun Ho Oh of Team KAIST shakes hands with Defense Advanced Research Projects Agency (DARPA) Director Arati Prabhakar after winning the finals of the DARPA Robotic Challenge in Pomona, California June 6, 2015. Twenty-four teams are competing to win a portion of a $3.5 million prize by operating humanoid robots across a task and obstacle course. REUTERS/Patrick T. Fallon 

The Team IHMC Robotics Atlas "Running Man" robot built by Boston Dynamics raises its arms to celebrate after climbing the stairs during the finals of the Defense Advanced Research Projects Agency (DARPA) Robotic Challenge in Pomona, California June 6, 2015. Twenty-four teams are competing to win a portion of a $3.5 million prize by operating humanoid robots across a task and obstacle course. REUTERS/Patrick T. Fallon 

Team members from IHMC Robotics watch as the Atlas "Running Man" robot built by Boston Dynamics walks out of a vehicle during the finals of the Defense Advanced Research Projects Agency (DARPA) Robotic Challenge in Pomona, California June 6, 2015. Twenty-four teams are competing to win a portion of a $3.5 million prize by operating humanoid robots across a task and obstacle course. REUTERS/Patrick T. Fallon 

The Team ROBOTIS humanoid robot THORMANG 2 is assisted out of a vehicle by engineers during the finals of the Defense Advanced Research Projects Agency (DARPA) Robotic Challenge in Pomona, California June 6, 2015. Twenty-four teams are competing to win a portion of a $3.5 million prize by operating humanoid robots across a task and obstacle course. REUTERS/Patrick T. Fallon 

The Team WPI-CMU robot climbs over cinder blocks during the finals of the Defense Advanced Research Projects Agency (DARPA) Robotic Challenge in Pomona, California June 6, 2015. Twenty-four teams are competing to win a portion of a $3.5 million prize by operating humanoid robots across a task and obstacle course. REUTERS/Patrick T. Fallon 

The Team ViGIR robot walks over a debris obstacle during a simulated disaster-response course on day one of the DARPA (Defense Advanced Research Projects Agency) Robotics Challenge finals in Pomona, California, June 5, 2015. The DARPA-sponsored event drew robotic teams from around the world to compete on a series of eight challenges throughout the course. REUTERS/David McNew 

Team KAIST robot handles a drill on a simulated disaster-response course on day one of the DARPA (Defense Advanced Research Projects Agency) Robotics Challenge finals in Pomona, California June 5, 2015. The DARPA-sponsored event draw robotic teams from around the world to compete on a series of eight challenges throughout the course. REUTERS/David McNew 

The Team Nedo-JSK robot is awarded a point after opening and walking through a door during the finals of the Defense Advanced Research Projects Agency (DARPA) Robotic Challenge in Pomona, California June 6, 2015. Twenty-four teams are competing to win a portion of a $3.5 million prize by operating humanoid robots across a task and obstacle course. REUTERS/Patrick T. Fallon 

Engineers work on the Team Nedo-JSK after it fell down during the finals of the Defense Advanced Research Projects Agency (DARPA) Robotic Challenge in Pomona, California June 6, 2015. Twenty-four teams are competing to win a portion of a $3.5 million prize by operating humanoid robots across a task and obstacle course. REUTERS/Patrick T. Fallon 

The Team ViGIR (Virgina-Germany Interdisciplinary Robotics) robot navigates an obstacle as it drives a Polaris vehicle during the finals of the Defense Advanced Research Projects Agency (DARPA) Robotic Challenge in Pomona, California June 6, 2015. Twenty-four teams are competing to win a portion of a $3.5 million prize by operating humanoid robots across a task and obstacle course. REUTERS/Patrick T. Fallon 

The Team Aero DRC robot is recovered after falling during the finals of the Defense Advanced Research Projects Agency (DARPA) Robotic Challenge in Pomona, California June 6, 2015. Twenty-four teams are competing to win a portion of a $3.5 million prize by operating humanoid robots across a task and obstacle course. REUTERS/Patrick T. Fallon 

The Team Nedo-JSK robot is readied in the team garage during the finals of the Defense Advanced Research Projects Agency (DARPA) Robotic Challenge in Pomona, California June 6, 2015. Twenty-four teams are competing to win a portion of a $3.5 million prize by operating humanoid robots across a task and obstacle course. REUTERS/Patrick T. Fallon 

Stephen McGill (L) and Heejin Jeong test the Team THOR "THOR-RD" robot during the finals of the Defense Advanced Research Projects Agency (DARPA) Robotic Challenge in Pomona, California June 6, 2015. Twenty-four teams are competing to win a portion of a $3.5 million prize by operating humanoid robots across a task and obstacle course. REUTERS/Patrick T. Fallon 

A man wears a sticker on day one of the DARPA (Defense Advanced Research Projects Agency) Robotics Challenge finals in Pomona, California June 5, 2015. The DARPA-sponsored event drew robotic teams from around the world to compete on a series of eight challenges throughout the course. REUTERS/David McNew 

The Tartan Rescue team CHIMP (CMU Highly Intelligent Mobile Platform) robot gets up after falling on a simulated disaster-response course on day one of the DARPA (Defense Advanced Research Projects Agency) Robotics Challenge finals in Pomona, California, June 5, 2015. The DARPA-sponsored event drew robotic teams from around the world to compete in a series of eight challenges throughout the course. REUTERS/David McNew 

The Team Tartan Rescue CHIMP (CMU Highly Intelligent Mobile Platform) robot from Carnegie Mellon University is readied in the team garage during the finals of the Defense Advanced Research Projects Agency (DARPA) Robotic Challenge in Pomona, California June 6, 2015. Twenty-four teams are competing to win a portion of a $3.5 million prize by operating humanoid robots across a task and obstacle course. REUTERS/Patrick T. Fallon 

Team members from IHMC Robotics celebrate after placing second in the finals of the Defense Advanced Research Projects Agency (DARPA) Robotic Challenge in Pomona, California June 6, 2015. Twenty-four teams are competing to win a portion of a $3.5 million prize by operating humanoid robots across a task and obstacle course. REUTERS/Patrick T. Fallon