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116th Boston Marathon

HOPKINTON, MA - APRIL 16: Runners take water from volunteers during the start of the 116th running of the Boston Marathon April 16, 2012 in Hopkinton, Massachusetts. (Photo by Darren McCollester/Getty Images)

Boston Marathon 2012

Kenya's Wesley Korir and Sharon Cherop won titles at the 116th Boston Marathon on Apr. 16 in heat that slowed the pace of world-class racers trying to impress Olympic selectors.