Russia's Sergey Kirdyapkin competes on his way to winning the men's 50-kilometer race walk at the 2012 Summer Olympics, Saturday, Aug. 11, 2012, in London. (AP Photo/Emilio Morenatti)
Russia's Sergey Kirdyapkin competes on his way to winning the men's 50-kilometer race walk at the 2012 Summer Olympics, Saturday, Aug. 11, 2012, in London. (AP Photo/Emilio Morenatti)