Shooting at Navy Yard in Washington
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A police helicopter is seen as police walk on the roof of a building as they respond to a shooting at the Washington Navy Yard, Sept. 16, 2013.
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A helicopter lifts a person off the roof as police respond to the report of a shooting at the Navy Yard in Washington, Sept. 16, 2013.
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Police work the scene near the Washington Navy Yard, Sept. 16, 2013.
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A police vehicle is seen as police respond to a shooting at the Washington Navy Yard, Sept. 16, 2013.