LONDON, ENGLAND - AUGUST 09: Caster Semenya of South Africa competes in the Women's 800m Semifinals on Day 13 of the London 2012 Olympic Games at Olympic Stadium on August 9, 2012 in London, England. (Photo by Mike Hewitt/Getty Images)
LONDON, ENGLAND - AUGUST 09: Caster Semenya of South Africa competes in the Women's 800m Semifinals on Day 13 of the London 2012 Olympic Games at Olympic Stadium on August 9, 2012 in London, England. (Photo by Mike Hewitt/Getty Images)