Article Photos: Kirdyapkin wins 50K walk; Bolt aiming for record



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/Emilio Morenatti)

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/Emilio Morenatti)