Jamaica's Usain Bolt, Yohan Blake, Nesta Carter, Michael Frater, timing board, world record time of 36.84 seconds set, men's 4x100-meter relay final. 計時板, 世界紀錄36.84秒設置, 男子4x100米接力決賽.

AP Photo/David J. Phillip

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2012 London Olympics -- Jamaica sets 4x100 world record behind Bolt - ESPN http://espn.go.com/olympics/summer/2012/trackandfield/story/_/id/8259728/2012-london-olympics-jamaica-sets-4x100-world-record-bolt