British Prime Minister David Cameron (L) and European Commission President Jose Manuel Barroso chat during a roundtable meeting at the EU Headquarters on December 13, 2012 in Brussels. European ... more 

British Prime Minister David Cameron (L) and European Commission President Jose Manuel Barroso chat during a roundtable meeting at the EU Headquarters on December 13, 2012 in Brussels. European leaders kicked off the last summit of a crisis-hit year to thrash out the euro's future less