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U.S. President Barack Obama (L) and his wife Michelle (R) pose for a photograph with Britain's Queen Elizabeth at Buckingham Palace in London April 1, 2009. [John Stillwell/CCTV/Pool/REUTERS]
![U.S. President Barack Obama (L) and his wife Michelle (R) pose for a photograph with Britain's Queen Elizabeth at Buckingham Palace in London April 1, 2009. [John Stillwell/Pool/REUTERS]](http://images.china.cn/attachement/jpg/site1007/20090402/000cf1a487730b3e65c144.jpg "U.S. President Barack Obama (L) and his wife Michelle (R) pose for a photograph with Britain's Queen Elizabeth at Buckingham Palace in London April 1, 2009. [John Stillwell/Pool/REUTERS]")
