British Prime Minister David Cameron, right, and Massachusetts Gov. Deval Patrick visit the makeshift memorial to the Boston Marathon bombing victims in Copley Square in Boston, Tuesday, May 14, 2013.... more 
British Prime Minister David Cameron, right, and Massachusetts Gov. Deval Patrick visit the makeshift memorial to the Boston Marathon bombing victims in Copley Square in Boston, Tuesday, May 14, 2013. (AP Photo/Michael Dwyer) less 
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Associated Press | Photo By Michael Dwyer
Tue, May 14, 2013 11:11 AM EDT