Medical workers aid injured people at the finish line of the 2013 Boston Marathon following an explosion Monday, April 15, 2013 in Boston. Two bombs exploded near the finish line of the marathon on Monday, killing at least two people, injuring at least 22 others and sending authorities rushing to aid wounded spectators. &#40;AP Photo&#47;Charles Krupa&#41; <span class=meta>(AP Photo&#47; Charles Krupa)</span>
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