British Prime Minister David Cameron and President Obama serve food to a member of the military during a barbecue in the garden of 10 Downing Street on May 25, 2011 in London.
Matt Dunham, WPA Pool / Getty Images
Michelle Obama and Samantha Cameron serve food during a barbecue in the garden of 10 Downing Street in London, Wednesday, May 25, 2011.
Matt Dunham, WPA Pool / Getty Images
U.S. President, Barack Obama addresses the members of both houses of the the British Parliament in Westminster Hall London, on Wednesday May 25, 2011.
Jeff J Mitchell, Pool / AP Photo
President Barack Obama, escorted by John Bercow, left, Speaker of the House of Commons, and Helen Hayman, Lord Speaker of the House of Lords, walks into Westminster Hall to address members of both Houses of Parliament in London, on Wednesday, May 25, 2011.
Carolyn Kaster / AP Photo
Deputy Prime Minister Nick Clegg talks to President Obama as Prime Minister Cameron looks on at 10 Downing Street, London.
PA / Landov
President Obama, first lady Michelle Obama, Queen Elizabeth II, and Prince Philip pose for photographers prior to a dinner hosted by the queen, May 24, 2011, at Buckingham Palace in London.
Larry Downing, Pool / AP Photo
Camilla, Duchess of Cornwall, President Obama, Queen Elizabeth II and Prince Philip, Duke of Edinburgh during a State Banquet in Buckingham Palace on May 24, 2011.
Lewis Whyld, WPA Pool / Getty Images
President Obama and Queen Elizabeth II during a State Banquet in Buckingham Palace on May 24, 2011 in London, England.
Lewis Whyld, WPA Pool / Getty Images
President Obama and wife Michelle pose with Britain's Prime Minister David Cameron and wife Samantha outside 10 Downing Street.
PA / Landov
President Obama and David Cameron play table tennis with students during a visit to the Globe Academy in London on May 24, 2011.
Clockwise from top left: Charles Dharapak / AP Photo; Paul Hackett, Pool
President Obama and his wife stand next to the Grave of the Unknown Warrior after laying a wreath during a tour of Westminster Abbey, in central London, as part of his three-day state visit to the U.K., on May 24, 2011.
John Stillwell, PA / AP Photo
Perhaps he drank one too many pints of Guinness in Ireland? Before leaving a stop at Westminster Abbey today during his state trip to the U.K., President Obama wrote in the guest book and signed his note, “May 24, 2008.” A witness swears it was Obama who wrote the note, and even said he was overheard asking the dean the date.
Rex Features / AP Photo
Obama walks with the Dean of Westminster, Dr, John Hall, during a tour of Westminster Abbey, as part of his three-day state visit to the U.K. on May 24, 2011.
Dominic Lipinski, PA / AP Photo
Michelle Obama shakes hands with members of The Choir of Westminster Abbey during a visit with her husband to Westminster Abbey in London, May 24, 2011.
Carolyn Kaster / AP Photo
The Obama's limo arrives at Buckingham Palace in London May 24, 2011.
Olivia Harris, Reuters / Landov
The Obamas are greeted by Britain's Queen Elizabeth, second right, and Prince Philip as they arrive at Buckingham Palace in London May 24, 2011.
Toby Melville, Pool / AP Photo
The Obamas attend a ceremonial welcome by Queen Elizabeth II and the Duke of Edinburgh in the garden of Buckingham Palace as part of the the president's state visit to the UK and Ireland.
PA / Landov
Britain's Queen Elizabeth II, President Obama, Camilla, Duchess of Cornwall, Prince Charles, First Lady Michelle Obama, and Prince Philip stand together, during their ceremonial welcome at Buckingham Palace in London on May 24, 2011.
Simon Dawson, Bloomberg / Getty Images
Britain's Queen Elizabeth II, President Obama, Camilla, Duchess of Cornwall, Prince Charles, First Lady Michelle Obama, and Prince Philip amid the wind.
Simon Dawson, Bloomberg / Getty Images
Britain's Queen Elizabeth II, President Obama, Prince Philip, the Duke of Edinburgh and First Lady Michelle Obama stand as they listen to the U.S. national anthem during a visit at Buckingham Palace on May 24, 2011.
Toby Melville, Pool / Getty Images
Obama inspects the honor guard during a ceremonial welcome in the garden of Buckingham Palace on May 24, 2011.
Christopher Furlong / Getty Images
The Obamas meet with Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge at Buckingham Palace on May 24, 2011 in London.
Toby Melville, Pool / Getty Images
The Obamas disembark from Air Force One at the Stansted airport in Essex, on May 23, 2011.
Jewel Samad, AFP / Getty Images
Crowds gather for Obama's speech in College Green, Dublin.
Press Association / AP Photo
Obama and Michelle enjoy a pint of Guinness in Hayes Bar in his ancestral home of Moneygall.
Rex Features / AP Photo
President Obama holds a hurley after it was given to him by Irish Prime Minister Taoiseach Enda Kenny at Farmleigh in Dublin, Ireland.
Irish Government / Getty Images
President Obama, President of Ireland Mary McAleese, Dr. Martin McAleese and First Lady Michelle Obama are seen outside the Aras an Uachtarain.
Rex Features / AP Photo
President Obama and Irish President Mary McAleese speak while walking through the Francini corridor in Aras an Uachtarain, the official residence of the president of Ireland.
Irish Government / Getty Images
From left, U.S. Ambassador Daniel M. Rooney and his wife Patricia Rooney, President Obama, President of Ireland Mary McAleese and her husband Martin McAleese, and First Lady Michelle Obama look to the media as the Obamas arrive at the presidential residence in Dublin, Ireland on May 23, 2011.
Carolyn Kaster / AP Photo
