CBS News reports on accused shooter Aaron Alexis' military service.
A Navy commander says someone was shot right next to him after the two had a brief conversation outside a Navy Yard building where police say a gunman opened fire.
D.C. Mayor Vince Gray says the motive of the shootings is not known.
President Obama calls the mass shooting a 'cowardly act'
One victim of the Navy Yard shooting who had a head wound died at George Washington Hospital.
Witnesses of the Washington Navy Yard Shooting describe the sounds and shooters.
A witness describes the evacuation of the Navy Yard.
Witness counted at least seven shots fired.
Dr. Janis Orlowski from Medstar Washington Hospital Center talks about the victims, injuries and the weapon type.
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