U.S. President Barack Obama welcomes the arrival of Britain's Queen Elizabeth at Winfield House in London

 
U.S. President Barack Obama welcomes the arrival of Britain
U.S. President Barack Obama welcomes the arrival of Britain's Queen Elizabeth at Winfield House - the residence of the Ambassador of the United States of America - in Regent's Park, London May 25, 2011. REUTERS/Yui Mok/PA Wire/Pool (BRITAIN - Tags: ROYALS POLITICS)