Bolt vows to prove he’s clean of drugs

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He’s the fastest runner ever, but Usain Bolt accepts that it will take people time to believe that he has no illegal assistance.

“The Olympics is going to be a very big thing for me because I did extraordinary things in Beijing,” he said. “I’m definitely coming here to defend my titles and I’m looking forward to it because there are a lot of Jamaicans here so I know it’s going to be a good Games. I’m just going to come here and do my best as always.” He was speaking at the launch of The Zeitz Foundation and The Long Run — a new global initiative by Jochen Zeitz, chairman and chief executive of sportswear maker Puma.