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

Pentagon: Navy Yard assault could have been prevented

March 18, 2014 7:11 PM