French President Nicolas Sarkozy listens during a news conference with European Commission President Jose Manuel Barroso, Britain's Prime Minister Gordon Brown, Germany's Chancellor Angela Merkel, and Italy's Prime Minister Romano Prodi at the Foreign Office in London January 29, 2008. Leaders of Europe's big four economies called on Tuesday for better cross-border cooperation and for banks to be more open about risk as they try to calm financial markets and shore up confidence. REUTERS/Kirsty Wigglesworth/Pool (BRITAIN)