Putin sworn in as riot police clash with protesters
Russia Putin
Police detain protesters in downtown Moscow shortly before Vladimir Putin's inauguration Monday, May 7, 2012. Putin's inauguration on Monday comes a day after an opposition protest drew more than 20,000 people, fewer than the mass demonstrations that preceded his election but still a sign that the anger over Putin's return to the Kremlin has not faded. (AP Photo/Ivan Secretarev)