Members of the United States 4 x 400m relay (from left) Ari Cogdell, Champion Allison, Wilbert London III and Kahmari Montgomery pose after winning in 3:02.39 during the IAAF World U20 Championships at Zawisza Stadium in Bydgoszcz, Poland on Sunday, July 24, 2016.Photo by Jiro Mochizuki
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