Cameron, de visita oficial en la Casa Blanca
US First Lady Michelle Obama(R) applauds Samantha Cameron, the wife of British Prime Minister David Cameron, during a welcome ceremony March 14, 2012 on the South Lawn of the White House in Washington, DC. AFP PHOTO/Mandel NGAN
US President Barack Obama hosts offical State Arrival cermonies for British Prime Minister David Cameron (L) on the South Lawn of the White House March 14, 2012, in Washington, DC.
British Prime Minister David Cameron speaks as U.S. President Barack Obama (R) reacts during an official Arrival Ceremony for Cameron on the South Lawn of the White House in Washington, March 14, 2012. REUTERS/Larry Downing (UNITED STATES - Tags: POLITICS)