POMONA, CA - JUNE 06:  Children interact with Aldebaran's Pepper robot during the Defense Advanced Research Projects Agency (DARPA) Robotics Challenge Expo at the Fairplex June 6, 2015 in Pomona, California. Organized by DARPA, the Pentagon's science research group, 24 teams from aorund the world are competing for $3.5 million in prize money that will be awarded to the robots that best respond to natural and man-made disasters.  (Photo by Chip Somodevilla/Getty Images)