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)

Photo by: Matt Slocum

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)