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Steven Gardiner (3rd R) of Bahamas sprints during the men's 400 meter final at the 2019 IAAF World Athletics Championships in Doha, Qatar, on Oct. 4, 2019. (Xinhua/Wang Lili)

Steven Gardiner (3rd R) of Bahamas sprints during the men's 400 meter final at the 2019 IAAF World Athletics Championships in Doha, Qatar, on Oct. 4, 2019. (Xinhua/Wang Lili)