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