U.S President Obama laughs with Italy’s Prime Minister Berlusconi and Russia’s President Medvedev as they pose for a family photograph at the G20 summit at the ExCel centre, in east London

U.S President Barack Obama (L) laughs with Italy’s Prime Minister Silvio Berlusconi (C) and Russia’s President Dmitry Medvedev as they pose for a family photograph at the G20 summit at the ExCel centre, in east London April 2, 2009. World leaders are set to declare an end to unfettered capitalism at a G20 summit on Thursday after France and Germany demanded they act fast on promises to prevent a repeat of the worst economic crisis since the 1930s. REUTERS/Stringer (BRITAIN BUSINESS POLITICS)