Dalilah Muhammad, of the United States prepares to race in a women's 400 meter hurdles semifinal at the World Athletics Championships in Doha, Qatar, Wednesday, Oct. 2, 2019. (AP Photo/Petr David Josek)
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Dalilah Muhammad, of the United States prepares to race in a women's 400 meter hurdles semifinal at the World Athletics Championships in Doha, Qatar, Wednesday, Oct. 2, 2019. (AP Photo/Petr David Josek)
