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Associated Press
California Gov. Edmund G Brown Jr., center, hands his pen to Google co-founder Sergey Brin, right, after a bill signing for driverless cars at Google headquarters as state Senator Alex Padilla, left, looks on in Mountain View, Calif., Tuesday, Sept. 25, 2012.  The legislation will open the way for driverless cars in the state. Google, which has been developing autonomous car technology and lobbying for the legislation has a fleet of driverless cars that has logged more than 300,000 miles (482,780 kilometers) of self-driving on California roads. (AP Photo/Eric Risberg)

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