This photo provided by Bruce Mendelsohn shows the scene after two  explosions occurred during the 2013 Boston Marathon in Boston, Monday,  April 15, 2013. Two explosions shattered the euphoria of the Boston  Marathon finish line on Monday, sending authorities out on the course to  carry off the injured while the stragglers were rerouted away from the  smoking site of the blasts. Photo: Bruce Mendelsohn, AP
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