Treasury Secretary Timothy Geithner makes a one-day trip to Poland this week for an unprecedented meeting with euro zone finance ministers as growing fears of a potential Greek debt default rip into Europe's banking sector. The trip comes as a surprise since Geithner returned only on Saturday from a meeting of Group of Seven finance ministers in Marseilles, France, where he said Europe's strongest economies must offer "unequivocal" backing to the weakest. Geithner is expected to attend the euro zone meeting on Friday and then return to Washington. The Treasury said on Monday only that he will discuss efforts to ... (full story)