Jamaica’sbecame successful to retain the 100m race title. The world record holder took 9.63sec to win the gold medal in 2012 London Olympics. Another Jamaican, Yohan Blake won the siver medal with 9.75sec timing. American 2004 gold medalist Justin Gatlin did a successful comeback from a 4-year doping ban by winning the bronze medal in a personal best of 9.79sec.
“When it comes to the championships, it's all about business for me and I brought it,” the Yahoo! Sports quoted Bolt as saying after winning the 100m race. "I feel extremely good and I'm happy," he added.
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