U.S. Chairman of the Federal Reserve, Ben Bernanke, arrives for the G20 Finance Ministers meeting at the Treasury, in central London September 5, 2009. Finance ministers and central bankers from the G20 nations were meeting in London on Saturday to lay the foundations for a summit of leaders in the U.S. city of Pittsburgh later this month. Reuters Pictures logo Reuters Pictures 29 months ago

U.S. Chairman of the Federal Reserve, Ben Bernanke, arrives for the G20 Finance Ministers meeting at the Treasury, in central London September 5, 2009. Finance ministers and central bankers from the G20 nations were meeting in London on Saturday to lay the foundations for a summit of leaders in the U.S. city of Pittsburgh later this month.