A woman places a balloon at a makeshift memorial as National Guardsmen secure a barrier not far from the finish line of the Boston Marathon. (Justin Lane / EPA)
Investigators in hazardous-material suits examine the scene of the second bombing on Boylston Street in Boston, a day after two blasts killed three and injured more than 170 people along the marathon route. (Elise Amendola / Associated Press)
Neighbors sit outside the house of Krystle Campbell’s parents in Medford, Mass. Campbell was killed in Monday’s bombing near the Boston Marathon finish line. (Michael Dwyer / Associated Press)
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After the barricades were moved up along Boylston Street to the corner of Berkeley, people walk along the route holding flags and memorials following Monday’s fatal bombings. (Darren McCollester / Getty Images)
