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)
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)
