France's President Nicolas Sarkozy (L) and Germany's Chancellor Angela Merkel (R) arrive at an European Union leaders summit in Brussels February 4, 2011. European Union leaders will discuss strengthening the euro zone's 440 billion euro bailout fund at a summit on Friday and try to agree how best to insulate the region from the year-long debt crisis. REUTERS/Thierry Roge (BELGIUM - Tags: POLITICS BUSINESS)