Barack Obama, Dmitry Medvedev

The President of the United States, Barack Obama, right, and Russian President Dmitry Medvedev shake hands during their meeting ahead of the G20 summit in London, Wednesday, April 1, 2009. Russia's continued opposition to U.S. missile defense sites in Eastern Europe and warhead cutbacks. Obama has indicated less enthusiasm for the missile system than predecessor George W. Bush, raising hopeful expectations in Moscow. (AP Photo/Alexander Zemlianichenko)

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