The American won gold in the men's 100 meters.
Jonnie Peacock is the Briton going for sprint gold in Rio de Janeiro.
The Jamaican easily defeated his rivals in the Olympic Stadium.
Justin Gatlin and Yohan Blake both crashed out.
The Jamaican sprinter says he was tired for the 100-meter final.
The 29-year-old ran the 100 meters in 9.81 to win gold.
The Jamaican sprinter proved his class again.
Bolt joins American Justin Gatlin and Jamaican Yohan Blake.
Coe's focus is on restoring trust in athletics.
After years in obscurity, Blake vows that he will take home Olympic gold.
The world's greatest sprinter says WADA is doing all it can to ensure clean sport.