Gay beats Powell to 2007 world title

American sprinter Tyson Gay wins the 100m at the 2007 world championships in Osaka, with Jamaica's Asafa Powell third.

It was revealed on 14 July, 2013, that both sprinters had failed drugs tests, with Gay's A sample from an out-of-competition test in May showing positive and Powell testing positive for a banned stimulant at June's Jamaican Championships.

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