NEW YORK — Like lightning out of nowhere, Usain Bolt is now the world's fastest man. The Jamaican sprinter, who doesn't even consider the 100 meters his best race, set the world record Saturday night with a time of 9.72 seconds at the Reebok Grand Prix, .02 seconds faster than the old mark held by his countryman, Asafa Powell.
Bolt was using the 100 as "speed work" to get better for his favorite race, the 200, and also to avoid having...
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