Sergey Kirdyapkin, of Russia, wins the gold medal in the men's 50-kilometer race walk at the 2012 Summer Olympics, Saturday, Aug. 11, 2012, in London. (AP Photo/Sergei Grits)
Sergey Kirdyapkin, of Russia, wins the gold medal in the men's 50-kilometer race walk at the 2012 Summer Olympics, Saturday, Aug. 11, 2012, in London. (AP Photo/Sergei Grits)