VANCOUVER, CANADA - APRIL 21:  Athletes participate in the 2013 Vancouver Sun Run, April 21, 2013. Many runners wore blue and yellow in support of the Boston marathon, where bombings occurred earlier.
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VANCOUVER, CANADA - APRIL 21: Athletes participate in the 2013 Vancouver Sun Run, April 21, 2013. Many runners wore blue and yellow in support of the Boston marathon, where bombings occurred earlier.