US President Barack Obama (L), Italian P

US President Barack Obama (L), Italian Prime Minister Silvio Berlusconi (C) and Russian President Dmitry Medvedev pose for a family photo during the G20 summit at the ExCel centre, in east London, on April 2, 2009. World leaders meet Thursday for a crunch summit of the Group of 20 richest nations aimed at fixing the crisis-wracked global economy. AFP PHOTO/Eric Feferberg (Photo credit should read ERIC FEFERBERG/AFP/Getty Images)