Race Video: Usain Bolt helps Jamaica to 4x100m World Record; USA crashes out

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Usain Bolt helps Jamaica to 4x100m World Record; USA crashes out Sept. 4, 2011: Usain Bolt helps Jamaica to gold and a world record time in the men's 4x100m relay, while a collision with Great Britain at the final hand-off leaves the U.S. with a DNF. From Universal Sports