An FBI agent goes door-to-door evacuating residents of Norfolk Street as investigators search for a suspect in the Boston Marathon bombings, in Cambridge, Mass.,
An FBI agent goes door-to-door evacuating residents of Norfolk Street as investigators search for a suspect in the Boston Marathon bombings, in Cambridge, Mass., AP
An FBI agent goes door-to-door evacuating residents of Norfolk Street as investigators search for a suspect in the Boston Marathon bombings, in Cambridge, Mass., AP

A timeline of the hunt for the Boston Marathon bombers

April 19, 2013 10:51 AM

UPDATED April 19, 2013 07:43 PM

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