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Sprint stars Gay, Powell fail drug tests

Tyson Gay (R) and Asafa Powell in the 100m in Daegu, South Korea, in 2009. The duo, two of the four fastest men in history, sent shockwaves through the blue riband 100m when both men failed drug tests.Tyson Gay and Asafa Powell, two of the four fastest men in history, sent shockwaves through the blue riband 100m when both men failed drug tests. Gay, the 30-year-old American who was world champion in 2007 and the fastest man in the world this year, tested positive for a banned substance and immediately withdrew from next month's world championships in Moscow.