World leaders walk to the family photo session at the G-8 Summit at Camp David, Md., Saturday, May 19, 2012. From left are Italian Premier Mario Monti, British Prime Minister David Cameron, German Chancellor Angela Merkel, U.S. President Barack Obama, French President Francois Hollande, Canadian Prime Minister Stephen Harper, Japanese Prime Minister Yoshihiko Noda, Russian Prime Minister Dmitri Medvedev and European Commission President Jose Manuel Barroso. (AP Photo/Philippe Wojazer, Pool)