Senior Department of Defense officials, including Defense Secretary Chuck Hagel laid a wreath at the U.S. Navy Memorial on Tuesday morning to honor victims of Monday's mass shooting at the Navy Yard ... more 
Senior Department of Defense officials, including Defense Secretary Chuck Hagel laid a wreath at the U.S. Navy Memorial on Tuesday morning to honor victims of Monday's mass shooting at the Navy Yard in Washington. (Sept. 17) less 
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Tue, Sep 17, 2013 11:10 AM EDT