A race fan waves the American flag and a banner bearing the slogan "Boston Strong" as runners compete in the 118th Boston Marathon Monday, April 21, 2014 in Hopkinton, Mass. (AP Photo/Michael Dwyer)
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A race fan waves the American flag and a banner bearing the slogan "Boston Strong" as runners compete in the 118th Boston Marathon Monday, April 21, 2014 in Hopkinton, Mass. (AP Photo/Michael Dwyer)
