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Photo gallery: Obama goes to Europe
The Obamas meet Will and Kate
U.S. President Barack Obama and first lady Michelle Obama talk to Britain's Prince William and Catherine, Duchess of Cambridge, at Buckingham Palace, in London, England on May 24, 2011. On Tuesday, Obama began a visit to Britain where he and Prime Minister David Cameron will review NATO action to help end conflict in Libya and Western policy towards uprisings in the Arab world. REUTERS/Charles Dharapak/Pool (BRITAIN - Tags: SOCIETY POLITICS ROYALS)
