Officers march into position near the blast site on Boylston Street between Dartmouth and Exeter Streets near the Boston Marathon finish line Monday, April 22, 2013 in Boston. Federal investigators ... more 
Officers march into position near the blast site on Boylston Street between Dartmouth and Exeter Streets near the Boston Marathon finish line Monday, April 22, 2013 in Boston. Federal investigators formally released the finish line bombing crime scene to the city in a brief ceremony at 5 p.m. (AP Photo/Robert F. Bukaty) less 
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Associated Press | Photo By Robert F. Bukaty
Tue, Apr 23, 2013 2:40 AM EDT