Kevin Lamarque / Reuters
U.S. President Barack Obama is escorted to address both Houses of Parliament in London on Wednesday, May 25. Flanking Obama are Speaker of the House of Commons John Bercow, left, and Speaker of the House of Lords Baroness Helene Hayman. Obama is on a four-nation European visit to Ireland, England, France and Poland.
Jeff J. Mitchell / Pool via EPA
President Barack Obama addresses the members of Parliament in Westminster Hall in London on Wednesday, May 25.
Larry Downing / Reuters
President Barack Obama, right, and British Prime Minister David Cameron serve sausages and hamburgers to US and British military service members, veterans and family members in a courtyard at 10 Downing Street in London on Wednesday.
Lawrence Jackson / The White House via Getty Images
First Lady Michelle Obama and Samantha Cameron, wife of British Prime Minister David Cameron, talk before having tea in the private residence at Downing Street on Tuesday.
Matt Cardy / Getty Images
President Barack Obama and British Prime Minister David Cameron leave Downing Street on Wednesday in London.
msnbc.com news services reports
In an address to British Parliament on Wednesday, President Barack Obama sought to counter critics who assert that U.S. and British influence in world affairs is waning as rising powers like China and India assert themselves.
- More photos from Obama's state visit in London here.