A police officer stands guard at the front gate of the Washington Naval Yard September 17, 2013 in Washington, D.C.
A police officer stands guard at the front gate of the Washington Naval Yard September 17, 2013 in Washington, D.C. MCT
A police officer stands guard at the front gate of the Washington Naval Yard September 17, 2013 in Washington, D.C. MCT

National Security

March 18, 2014 7:11 PM

Pentagon: Navy Yard assault could have been prevented

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