Russia's Sergey Kirdyapkin celebrates winning the men's 50-kilometer race walk at the 2012 Summer Olympics, Saturday, Aug. 11, 2012, in London. (AP Photo/Mike Groll)
Russia's Sergey Kirdyapkin celebrates winning the men's 50-kilometer race walk at the 2012 Summer Olympics, Saturday, Aug. 11, 2012, in London. (AP Photo/Mike Groll)