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US sprinter Michael Johnson wins the 200-meter run setting a world record of 19.32 seconds at the 1996 Atlanta Olympic Games. (Photo by © Wally McNamee/CORBIS/Corbis via Getty Images)

US sprinter Michael Johnson wins the 200-meter run setting a world record of 19.32 seconds at the 1996 Atlanta Olympic Games. (Photo by © Wally McNamee/CORBIS/Corbis via Getty Images)