Brianna Rollins (top) and Kristi Castlin of the United States of America celebrate after the women's 100m hurdles final of Athletics at the 2016 Rio Olympic Games in Rio de Janeiro, Brazil, on Aug. 17, 2016. (Xinhua/Li Ming)
Brianna Rollins (top) and Kristi Castlin of the United States of America celebrate after the women's 100m hurdles final of Athletics at the 2016 Rio Olympic Games in Rio de Janeiro, Brazil, on Aug. 17, 2016. (Xinhua/Li Ming)
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