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      • Sarah Aarthun
        Managing Editor, National Digital News

        Sarah Aarthun is the managing editor for CNN Digital's National News Desk, overseeing breaking news coverage of national events.

        Full Bio

      Tragedy strikes Newtown, Connecticut

      CHARLOTTE, NC - SEPTEMBER 04: San Antonio Mayor Julian Castro gives the keynote address on stage during day one of the Democratic National Convention at Time Warner Cable Arena on September 4, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Joe Raedle/Getty Images)

      Julian Castro: Rising Democratic star

      exp erin sandy storm damage nyc marathon canceled _00002001

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