Posted 12.08.2012 09:43:03 UTC
Updated 12.08.2012 09:43:03 UTC
Bolt, who gave himself the title after defending the 100 and 200 crowns he won in Beijing four years ago, anchored the Jamaican quartet of Nesta Carter, Michael Frater and Yohan Blake to victory in 36.84 seconds, knocking 0.2 off the record they set at last year's world championships.
Reuters