BBC: The Queen has greeted US President Barack Obama, and his wife Michelle, at the start of his first UK state visit.
The Obamas also met Prince Charles and the Duchess of Cornwall and spent 20 minutes with newlyweds the Duke and Duchess of Cambridge.
They have laid a wreath on the Tomb of the Unknown Warrior in Westminster Abbey and will attend a state banquet at Buckingham Palace.
It came after David Cameron and Mr Obama spoke of "essential" UK-US ties.
'Common interests'
In a joint article in the [sic] Times [£], Mr Obama and Mr Cameron said of their countries' relationship: "Ours is not just a special relationship, it is an essential relationship - for us and for the world.
"When the United States and Britain stand together, our people and people around the world can become more secure and more prosperous.
"The reason it thrives is because it advances our common interests and shared values. It is a perfect alignment of what we both need and what we both believe."
The presidential pair's visit to Westminster Abbey included an impromptu meeting with choirboys, when Mr Obama was teased by his wife for his lack of singing talent.
"He insisted on speaking to each one of them and shaking their hands," the Dean, Dr John Hall said.
"He said that he liked to think he could sing and Mrs Obama said 'Well, he can't really, he can dance'." (+ video) » | Tuesday, May 24, 2011
