U.S President Barack Obama (R) speaks to Treasury Secretary Timothy Geithner before the start of the Plenary Session 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/Kevin Coombs (BRITAIN BUSINESS POLITICS)