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Photo by: Anja Niedringhaus

In this Aug. 19, 2009, file photo, South Africa's Caster Semenya celebrates after winning the gold medal in the final of the Women's 800m at the World Athletics Championships in Berlin. Semenya has been cleared to return to competitive athletics by the IAAF with immediate effect. Athletics' world governing body gave Semenya the go-ahead to compete again in a statement Tuesday July 6, 2010, saying "the IAAF accepts the conclusion of a panel of medical experts that she can compete with immediate effect." (AP Photo/Anja Niedringhaus, File)

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