**FILE** South Africa's Oscar Pistorius embraces Grenada's Kirani James after the men's 400-meter semifinal during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Sunday, Aug. 5, 2012. (AP Photo/Anja Niedringhaus)
**FILE** Gold medalist South Africa's Oscar Pistorius poses Sept. 8, 2012, with his medal during the ceremony after winning the men's 400 meters T44 category final during the athletics competition at the 2012 Paralympics in London. (Associated Press)
South Africa's Oscar Pistorius takes the baton from teammate L J van Zyl during the men's 4x400-meter during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Matt Slocum)
**FILE** South Africa's Oscar Pistorius participates Aug. 5, 2012 in the men's 400-meter semifinal at Olympic Stadium during the 2012 Summer Olympics in London. (Associated Press)
South Africa's Oscar Pistorius waves after running in the men's 400-meter semifinal during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Sunday, Aug. 5, 2012. (AP Photo/Anja Niedringhaus)
South Africa's Oscar Pistorius competes in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012. (AP Photo/Matt Dunham)
Oscar Pistorius of South Africa runs with the aid of carbon fiber blades. Both of his legs were amputated below the knee when he was 11 months old. (Associated Press)
**FILE** South Africa's Oscar Pistorius competes Sept. 1, 2011, in a qualification round for the Men's 4x400m relay at the World Athletics Championships in Daegu, South Korea. (Associated Press)