Euro zone officials have agreed that each euro zone country must prepare an individual contingency plan in the eventuality that Greece decides to leave the single currency area, two eurozone officials said on Wednesday. The agreement was reached during a teleconference of the Eurogroup Working Group (EWG), which started at 9:00 a.m. EDT (1300 GMT) on Monday and lasted for about one hour. As well as confirmation from two officials, Reuters has seen a memo drawn up by one member state detailing some of the elements that euro zone countries should consider. The EWG consists of officials who prepare meetings of finance ... (full story)