President Obama talks with Britain's Queen Elizabeth II during a tour of the Queen's Gallery at Buckingham Palace in London on Tuesday, May 24, 2011. (AP Photo/Charles Dharapak)

Photo by: Charles Dharapak

President Obama talks with Britain's Queen Elizabeth II during a tour of the Queen's Gallery at Buckingham Palace in London on Tuesday, May 24, 2011. (AP Photo/Charles Dharapak)