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, May 25, 2011.
Pictures: Obamas visit Ireland
Pictures: Prince William and Kate Middleton
Special Section: Britain's royal wedding
Pictures: President Obama
Pictures: Michelle Obama
Credit: AP Photo/Carolyn Aster