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    • Alex Marquardt
      Senior National Security Correspondent

      Alex Marquardt is an award-winning Senior National Security Correspondent based in the network's Washington bureau, focusing on national security issues.

      Full Bio


    The Lead Alex Marquardt DNT_00004714.png

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    David Cohen, undersecretary for terrorism and financial intelligence at the U.S. Treasury, speaks during an interview in New York, U.S., on Tuesday, March 18, 2014. Virtual currencies will benefit from government oversight that lends credibility to the market, according to the U.S. Treasury Department's top official targeting money laundering. Photographer: Scott Eells/Bloomberg via Getty Images