Russian billionaire and presidential candidate Mikhail Prokhorov (C), surrounded by supporters, talks...
Russian billionaire and presidential candidate Mikhail Prokhorov (C), surrounded by supporters, talks to the media at a railway station in St. Petersburg after travelling by Sapsan high speed train from Moscow in this February 10, 2012 file photo. Russians will go to the polls on March 4, 2012, to choose one of five candidates to be their new president. Picture taken February 10, 2012. REUTERS/Alexander Demianchuk (RUSSIA - Tags: POLITICS ELECTIONS)