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U.S. President Obama and first lady Michelle Obama react as car carrying Queen Elizabeth arrives in London

U.S. President Barack Obama (L) and first lady Michelle Obama react as the car carrying Queen Elizabeth and Prince Philip, Duke of Edinburgh, arrives at Winfield House in London, May 25, 2011. REUTERS/Larry Downing (BRITAIN - Tags: POLITICS IMAGES OF THE DAY) FOR BEST QUALITY IMAGE: ALSO SEE GM1E75Q1TOE01

Obama's funny moments

A look at some humorous highlights from Obama's presidency.