Disbelief and horror in washington and across the nation after a gunman hopes fire on a u. S. Naval station. Victims are still being identified. 12 are dead, at least a dozen more are injured. Initially two people were thought to be helping the gunman. Now authorities are reassessing its investigation. The gunman was a navy contractor, aaron alexis, 34 years old, who worked in fort worth, texas. The shooting took place in the navy yard less than two miles from the white house. Lets bring in Mike Viqueira with more. Mike . John in the heart of the nations capitol, almost unthinkable what has transfired almost 12 hours ago. The police are informing us that they are going to reopen m street in southeast washington, the main artery through this part of town. They want all of the press to get up and out. Massive response from Law Enforcement across the metropolitan area, both air and on the ground as emergency vehicles poured in. Sirens blaring through the navy yard, and park Police Service