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Photo gallery: Obama goes to Europe
U.S. President Barack Obama speaks with Prince Charles as they leave Winfield House in central London
U.S. President Barack Obama speaks with Prince Charles (L) as they leave Winfield House, the official residence of the United States ambassador, in Regent's Park, central London May 24, 2011. Obama on Tuesday begins 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/Dominic Lipinski/POOL
