FILE - In this Tuesday, Sept. 25, 2012, file photo, Google co-founder Sergey Brin stands on stage during a bill signing by California Gov. Edmund G. Brown Jr., for driverless cars at Google headquarters in Mountain View, Calif. Google said Wednesday, Feb. 20, 2013, it is giving a few more people a chance to pay $1,500 for a pair of the Internet-connected glasses that the company is touting as the next breakthrough in mobile computing. (AP Photo/Eric Risberg)

Associated Press
FILE - In this Tuesday, Sept. 25, 2012, file photo, Google co-founder Sergey Brin stands on stage during a bill signing by California Gov. Edmund G. Brown Jr., for driverless cars at Google headquarters in Mountain View, Calif. Google said Wednesday, Feb. 20, 2013, it is giving a few more people a chance to pay $1,500 for a pair of the Internet-connected glasses that the company is touting as the next breakthrough in mobile computing. (AP Photo/Eric Risberg)
FILE - In this Tuesday, Sept. 25, 2012, file photo, Google co-founder Sergey Brin stands on stage during a bill signing by California Gov. Edmund G. Brown Jr., for driverless cars at Google headquarters in Mountain View, Calif. Google said Wednesday, Feb. 20, 2013, it is giving a few more people a chance to pay $1,500 for a pair of the Internet-connected glasses that the company is touting as the next breakthrough in mobile computing. (AP Photo/Eric Risberg)
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