Putin sworn in as riot police clash with protesters
Russia Putin
President Vladimir Putin and former president Dmitry Medvedev, right, walk in Moscow's Kremlin during an inauguration ceremony on Monday, May 7, 2012. Vladimir Putin has been sworn in as Russia's president for a third term after four years as prime minister. (AP Photo/RIA Novosti Kremlin, Mikhail Klimentyev, Presidential Press Service)






