Medical workers aid an injured man at the finish line of the 2013 Boston Marathon following an explosion there Monday, April 15, 2013 in Boston. Two explosions shattered the euphoria at the 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. &#40;AP Photo&#47;Charles Krupa&#41; <span class=meta>(AP Photo&#47; Charles Krupa)</span>
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