British Prime Minister David Cameron and his wife Samantha attend an official state dinner at the White House.<br/> <br />Joining the couples for dinner was actors George Clooney and Damian Lewis and editor-in-chief of American Vogue, Anna Wintour.<br/> <br />Cameron's visit, designed to stress unity between the two leaders, is his second since coming to power in 2010.<br/> <br />Alicia Powell, Reuters.
