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BEIJING, CHINA - AUGUST 27: Allyson Felix of the United States (C) sprints to the finish line to win gold ahead of Shaunae Miller of the Bahamas (R)in the Women's 400 metres Final during day six of the 15th IAAF World Athletics Championships Beijing 2015 at Beijing National Stadium on August 27, 2015 in Beijing, China. (Photo by Ian Walton/Getty Images)