South Africa’s Oscar Pistorius (R) and G

South Africa's Oscar Pistorius, right, exchanges bibs with Grenada's Kirani James, who won the heat. (Johannes Eisele/AFP/Getty Images)

South Africa’s Oscar Pistorius, right, exchanges bibs with Grenada’s Kirani James, who won the heat. (Johannes Eisele/AFP/Getty Images)

South Africa’s Oscar Pistorius (R) and Grenada’s Kirani James exchange bips after the men’s 400m semi-finals at the athletics event during the London 2012 Olympic Games on August 5, 2012 in London. AFP PHOTO / JOHANNES EISELEJOHANNES EISELE/AFP/GettyImages