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Elite field runners Mohamed Hrezi and Sammy Rotich behind the starting line at the 2019 B.A.A. Half Marathon, Boston, Mass., Oct. 13, 2019. Photo by Sofie Isenberg/ BU News Service
Elite field runners Mohamed Hrezi and Sammy Rotich behind the starting line at the 2019 B.A.A. Half Marathon, Boston, Mass., Oct. 13, 2019. Photo by Sofie Isenberg/ BU News Service
