U.S. President Obama and first lady Michelle Obama pose before dinner hosted by Queen Elizabeth in London...
U.S. President Barack Obama (2nd L) and first lady Michelle Obama (2nd R) pose with Queen Elizabeth (L) and Prince Phillip, Duke of Edinburgh (R) before a State Dinner at Buckingham Palace in London May 24, 2011. REUTERS/Larry Downing (BRITAIN - Tags: POLITICS ROYALS)