Britain's Prime Minister Gordon Brown and U.S. President Barack Obama leave 10 Downing Street in London
Britain's Prime Minister Gordon Brown (R) and U.S. President Barack Obama leave 10 Downing Street in London April 1, 2009. World leaders will have their work cut out at a G20 summit where Obama makes his first major international sortie, under perhaps more pressure than anyone to show that the country where the crisis began can lead the way out. REUTERS/Toby Melville (BRITAIN POLITICS BUSINESS)
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