On the night last spring when Osama bin Laden was killed, the chief of staff to a former U.S. secretary of defense broke the news to the world—more than an hour before President Barack Obama's announcement. Keith Urbahn (aka @keithurbahn) wrote to his 1,016 Twitter followers that he'd heard the news from a "reputable person." Within a minute, 80 people had reposted the message. One of them was New York Times reporter Brian Stelter, whose retweet led to another large burst of responses. Urbahn's tweet was on its way to going viral.
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