In this Tuesday, Nov. 23, 2010, photo Russian Prime Minister Vladimir Putin, left with U.S. actor Leonardo Di Caprio, right, after a concert dedicated to tiger conservation in St. Petersburg, Russia. Officials from the 13 countries where tigers live in the wild have signed a declaration aimed at saving the iconic big cats from extinction. Russia is home to Siberian tigers, and Putin hosted the "tiger summit." (AP Photo/RIA Novosti, Alexei Druzhinin, Pool)
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