many initial designs also struggled to handle both sensing upcoming obstacles and following the GPS waypoints simultaneously. DARPA Grand Challenge deputy program manager Tom Strat said, "some of the vehicles were able to follow the GPS waypoints very accurately; but were not able to sense obstacles ahead....Other vehicles were very good at sensing obstacles, but had difficulty following waypoints or were scared of their own shadow, hallucinating obstacles when they weren't there." Several teams returned the next year, learning from the 2004 event and updating their designs. References External links Official sites The home page of the 2004 DARPA Grand Challenge DGC-2004 Teams TV & Video coverage NOVA: The Great Robot Race Press Coverage The Register: Final robot grunts picked for $1million DARPA race The Register: DARPA's Grand Challenge proves to be too grand CNN.com: Robots fail to complete Grand Challenge SFGate.com: Robot race suffers quick, ignoble end 2004 DARPA Grand Challenge Image Gallery 2004 DARPA Grand Challenge in Spanish Journal of Field Robotics, Special Issue on DARPA Grand Challenge, Part 1 Journal of Field Robotics, Special Issue on DARPA Grand Challenge, Part 2 Popular Mechanics article on the DARPA Grand Challenge. Popular Science article on the DARPA Grand Challenge. Scientific American article on the DARPA Grand Challenge. NOVA: The Great Robot Race Team Sites