U.S. President Barack Obama, center, speaks at the start of the first working session of the G8 Summit at Camp David, Md., Saturday May 19, 2012. Seated, clockwise from left, are Japanese Prime Minister Yoshihiko Noda, Italian Prime Minister Mario Monti, Canadian Prime Minister Stephen Harper, French President Francois Hollande, Obama, British Prime Minister David Cameron, Russian Prime Minister Dmitry Medvedev, German Chancellor Angela Merkel, European Council President Herman Van Rompuy, and European Commission President Jose' Manuel Barroso, backs to camera. (AP Photo/Philippe Wojazer, Pool)

Photo by: PHILIPPE WOJAZER

U.S. President Barack Obama, center, speaks at the start of the first working session of the G8 Summit at Camp David, Md., Saturday May 19, 2012. Seated, clockwise from left, are Japanese Prime Minister Yoshihiko Noda, Italian Prime Minister Mario Monti, Canadian Prime Minister Stephen Harper, French President Francois Hollande, Obama, British Prime Minister David Cameron, Russian Prime Minister Dmitry Medvedev, German Chancellor Angela Merkel, European Council President Herman Van Rompuy, and European Commission President Jose' Manuel Barroso, backs to camera. (AP Photo/Philippe Wojazer, Pool)