Jamaican sprinter Usain Bolt

Associated Press
Jamaican sprinter Usain Bolt, right, stretches out to win the men's 200-meter race, during the Athletics Diamond League meeting at Stade de France stadium, in Saint Denis, north of Paris, Saturday, July 6, 2013. Other sprinters are from left: Jamaican Warren Weir, France's Christophe Lemaitre, Jamaican Nickel Ashmeade. (AP Photo/Remy de la Mauviniere)

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The Jamaican sprinter and three-time Olympic gold medalist will be one of the biggest names to watch at the London Games.

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