South Africa's Caster Semenya celebrates winning silver in the Women's 800m final at the World Athletics Championships in Daegu, South Korea, Sunday, Sept. 4, 2011. (AP Photo/Lee Jin-man)

Associated Press
South Africa's Caster Semenya celebrates winning silver in the Women's 800m final at the World Athletics Championships in Daegu, South Korea, Sunday, Sept. 4, 2011. (AP Photo/Lee Jin-man)
South Africa's Caster Semenya celebrates winning silver in the Women's 800m final at the World Athletics Championships in Daegu, South Korea, Sunday, Sept. 4, 2011. (AP Photo/Lee Jin-man)
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