MOUNTAIN VIEW, CA - SEPTEMBER 25:  A Google self-driving car is displayed at the Google headquarters on September 25, 2012 in Mountain View, California.  California Gov. Jerry Brown signed State Senate Bill 1298 that allows driverless cars to operate on public roads for testing purposes. The bill also calls for the Department of Motor Vehicles to adopt regulations that govern licensing, bonding, testing and operation of the driverless vehicles before January 2015.  (Photo by Justin Sullivan/Getty Images)
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