A row of Google self-driving Lexus cars at a Google event outside the Computer History Museum in Mountain View, California, May 13, 2014 file photo shows. (AP Photo/Eric Risberg) ** FILE **
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A row of Google self-driving Lexus cars at a Google event outside the Computer History Museum in Mountain View, California, May 13, 2014 file photo shows. (AP Photo/Eric Risberg) ** FILE **
