PARIS (Paul Taylor) - The euro faces a decisive week as European Union leaders, urged on anxiously by the United States, seek agreement on a convincing rescue plan that has eluded them for two years.Despite short-term market optimism about a possible deal to tackle Europe's sovereign debt crisis and underpin the survival of the single currency, the outcome is far from certain as the EU gears up for a summit in Brussels on Thursday and Friday.Read More... More on Paris