How the Story of Trayvon Martin Went Viral

Data provided by Bitly, a Web service that shortens URLs for easier sharing, revealed dramatic spikes in the volume of clicked links relating to the killing of Trayvon Martin. Initially, the story mostly drew a local audience. It erupted online following the release of 911 calls by the Sanford (Fla.) Police Department. Web chatter about the case then spread nationally.

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