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400 Metres
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USA athlete Allyson Felix and group of female runner at the 400m race of Golden Gala of Rome 2011 Stock Photo - Alamy
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/michaeljohnsonWR400-ShaunBotterill-56a6cc653df78cf77290225c.jpg "Men's 400-Meter World Records")
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Sanya Richards-Ross (USA) gold medal winner in the Women's 400m at the Olympic Summer Games, London 2012 Stock Photo - Alamy
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400 Metres
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