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)
Russian Prime Minister Vladimir Putin, right, Prime Minister of Nepal Madhav Kumar, center, and, Prime Minister of Bangladesh Sheikh Hasina attend the International Tiger Forum in St.Petersburg, Russia, on Tuesday, Nov. 23, 2010. (AP Photo/Dmitry Lovetsky)
Russian Prime Minister Vladimir Putin prepares to drive a Renault racing car at a racetrack outside St. Petersburg, Russia, on Sunday. Mr. Putin tested his capacities as a Formula One driver. (Associated Press)
In this photo taken Sunday, Aug. 29, 2010, Russian Prime Minister Vladimir Putin speaks with road makers, not seen, while traveling on a newly opened highway Chita- Khabarovsk, in Russia's Far Eastern region of Amur, some 3,800 miles southeast of Moscow. (AP Photo/RIA-Novosti, Alexei Druzhinin, Pool)
Russian Prime Minister Vladimir Putin, right, shakes hands while visiting the construction site of a new launch facility, the Cosmodrome Vostochny, outside Uglegorsk, some 3,600 miles (5800 kilometers) east of Moscow, Russia, Saturday, Aug. 28, 2010. Russia will launch its manned space missions from a new center in the Far East in 2018, Prime Minister Vladimir Putin said Saturday, as the country seeks greater independence for its space program. (AP Photo/Alexei Druzhinin, Pool)
Russian Prime Minister Vladimir Putin holds a crossbow as he sits on a rubber boat at the Olga Harbor of Kamchatka Peninsula during a scientific expedition, to study grey whales on Wednesday, Aug.25, 2010. (AP Photo/ RIA Novosti, Alexei Druzhinin, pool)
Russian Prime Minister Vladimir Putin aims a crossbow as he is on a rubber boat at the Olga Harbor of Kamchatka Peninsula during a scientific expedition, to study grey whales on Wednesday, Aug.25, 2010. (AP Photo/ RIA Novosti, Alexei Druzhinin, pool)
Russian Prime Minister Vladimir Putin sits in the cockpit of an Emergency Ministry Beriev Be-200 amphibian multirole jet flying a water drop over forest fires in Russia's Ryazan region, some 111 miles southeast of Moscow, on Tuesday, Aug. 10, 2010. (AP Photo/RIA Novosti, Alexei Nikolsky, Pool)
** FILE ** Russian President Dmitry Medvedev (right) acknowledges Prime Minister Vladimir Putin during the 2008 funeral of Russian Orthodox Patriarch Alexy II at the Christ the Savior Cathedral in Moscow. (Agence France-Presse/Getty Images)
Russian Prime Minister Vladimir Putin speaks during an interview with Germany's ARD television in the Black Sea resort of Sochi, Russia, Friday, Aug. 29, 2008. Prime Minister Vladimir Putin said Friday that Russia will not be isolated over its conduct in Georgia and warned the Europe not to "serve" the United States. He also stressed Russia does not fear any Western sanctions, saying that if forced to choose between life and sausage, "we choose life." (AP Photo/RIA-Novosti, Alexei Druzhinin, Pool)
Russian Prime Minister Vladimir Putin (left) and Gazprom chief Alexei Miller visit the Sevmash shipyard in Severodvinsk. Mr. Putin expressed concern about the country's declining oil production and said the sector has reached a "critical juncture."
** FILE ** Vladimir Putin (left) and his handpicked successor, Dmitry Medvedev, greet supporters in Moscow's Red Square during a concert to mark the presidential election in March 2008. (AP Photo/RIA-Novosti, Vladimir Rodionov, Presidential Press Service)
President Bush and Russian President Vladimir Putin appeared comfortable with each other yesterday in Kennebunkport, Maine. On their second day together, the leaders discussed a planned U.S. missile defense system and Iran's nuclear ambitions.