Yemane Tsegay, of Ethiopia, fourth from left, leads the pack of elite men runners along the course of the 121st Boston Marathon on Monday, April 17, 2017, in Hopkinton, Mass. (AP Photo/Steven Senne)
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Yemane Tsegay, of Ethiopia, fourth from left, leads the pack of elite men runners along the course of the 121st Boston Marathon on Monday, April 17, 2017, in Hopkinton, Mass. (AP Photo/Steven Senne)
