South Africa’s Caster Semenya celebrates

South Africa's Caster Semenya celebrates after competing in the women's 800 semifinals. (AFP PHOTO / OLIVIER MORIN)

South Africa’s Caster Semenya celebrates after competing in the women’s 800 semifinals. (AFP PHOTO / OLIVIER MORIN)

South Africa’s Caster Semenya celebrates after competing in the women’s 800 semifinals at the athletics event during the London 2012 Olympic Games on August 9, 2012 in London. AFP PHOTO / OLIVIER MORINOLIVIER MORIN/AFP/GettyImages