Twitter founder Biz Stone (L) talks with San Francisco Mayor Gavin Newsom before a news conference in San Francisco, California June 1, 2009. Newsom announced a civic collaboration between the social networking service and the city's 311 customer service center, where citizens can now alert officials to issues by using Twitter. Reuters Pictures logo Reuters Pictures 32 months ago

Twitter founder Biz Stone (L) talks with San Francisco Mayor Gavin Newsom before a news conference in San Francisco, California June 1, 2009. Newsom announced a civic collaboration between the social networking service and the city's 311 customer service center, where citizens can now alert officials to issues by using Twitter.

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