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Christian Coleman of the United States celebrates after the men's 100m final at the 2019 IAAF World Championships in Doha, Qatar, Sept. 28, 2019. (Xinhua/Wang Jingqiang)

Christian Coleman of the United States celebrates after the men's 100m final at the 2019 IAAF World Championships in Doha, Qatar, Sept. 28, 2019. (Xinhua/Wang Jingqiang)