Putin sworn in as riot police clash with protesters

Russian riot police try to clear a boulevard of opposition protesters as a man sleeps on a bench in downtown Moscow, 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/Misha Japaridze)