Putin sworn in as riot police clash with protesters
APTOPIX Russia Putin
Vladimir Putin enters St. Andrew's Hall to take the oath of office during his inauguration as new Russia's president in the Grand Kremlin Palace in Moscow 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, Alexei Druzhinin, Government Press Service)