Dye colors the Chicago River green ahead of the St. Patrick's Day parade in Chicago on Saturday, March 15, 2014. The annual dying has been done since 1962. (AP Photo/Paul Beaty)
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Dye colors the Chicago River green ahead of the St. Patrick's Day parade in Chicago on Saturday, March 15, 2014. The annual dying has been done since 1962. (AP Photo/Paul Beaty)
