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Police respond to the report of a shooting at the Navy Yard in Washington, tt, September 16, 2013.  A gunman shot and wounded at least one person Monday in a headquarters building at the US Navy Yard in Washington and is still at large, the navy said."There is one confirmed injury. Emergency personnel are on scene and a 'shelter in place' order has been issued for Navy Yard personnel," the navy said in a statement. Local television reported that there were as many as five casualties and the Navy said that police had entered building number 197 in search of the shooter. The Navy said at least three shots were fired at 8:20 am (1320 GMT) in the headquarters building of the Naval Sea Systems tommand. AFP PHOTO / Saul LOE SAUL LOE /AFP/Getty Images
Police respond to the report of a shooting at the Navy Yard in Washington, tt, September 16, 2013.  A gunman shot and wounded at least one person Monday in a headquarters building at the US Navy Yard in Washington and is still at large, the navy said."There is one confirmed injury. Emergency personnel are on scene and a 'shelter in place' order has been issued for Navy Yard personnel," the navy said in a statement. Local television reported that there were as many as five casualties and the Navy said that police had entered building number 197 in search of the shooter. The Navy said at least three shots were fired at 8:20 am (1320 GMT) in the headquarters building of the Naval Sea Systems tommand. AFP PHOTO / Saul LOE SAUL LOE /AFP/Getty Images

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Hagel: We'll fix security gaps

Defense Secretary Chuck Hagel comments on measures that will be taken in the wake of the Washington Navy Yard shooting.

Hagel: We'll fix security gaps

Defense Secretary Chuck Hagel comments on measures that will be taken in the wake of the Washington Navy Yard shooting.