Police help a runner after multiple explosions rocked the finish line of the Boston Marathon on Monday, April 15, 2013, in Boston, Massachusetts.
Police help a runner after multiple explosions rocked the finish line of the Boston Marathon on Monday, April 15, 2013, in Boston, Massachusetts. MCT
Police help a runner after multiple explosions rocked the finish line of the Boston Marathon on Monday, April 15, 2013, in Boston, Massachusetts. MCT

Politics & Government

April 16, 2013 6:05 PM

Boston bombing probe involves ‘voluminous tips,’ painstaking detail

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