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More shots just fired: WRC

10:57 AM ET Mon, 16 Sept 2013

Reports of more shots being fired at the Washington Navy Yard, where a shooting has left at least 10 people injured and four dead, reports CNBC's Eamon Javers. Roger Cressey, NBC terrorism analyst, provides insight on the dangers of multiple shooters and security surrounding military posts. And security expert Anthony Roman discusses what's likely taking place inside and outside the perimeter of the crime scene.