FILE - In this Aug. 4, 2012 file photo, Jamaica's Asafa Powell prepares to compete in a men's 100-meter heat at the 2012 Summer Olympics in London. Powell has been banned from his sport for 18 months.... more 
FILE - In this Aug. 4, 2012 file photo, Jamaica's Asafa Powell prepares to compete in a men's 100-meter heat at the 2012 Summer Olympics in London. Powell has been banned from his sport for 18 months. The 31-year-old sprinter tested positive for the banned stimulant oxilofrone at Jamaica's national trials last June. (AP Photo/Matt Slocum, File) less 
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Associated Press | Photo By Matt Slocum, File
Thu, Apr 10, 2014 11:58 AM EDT