FILE This Wednesday, Sept. 14, 2011 file photo shows Britain's Prime Minister David Cameron leaving Downing Street in London, to attend the weekly Prime Ministers Questions in

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FILE This Wednesday, Sept. 14, 2011 file photo shows Britain's Prime Minister David Cameron leaving Downing Street in London, to attend the weekly Prime Ministers Questions in Parliament. Goodbye Britain? For the European Union, a once-unthinkable question is looking more like a real possibility with each new grinding week of economic crisis. The reason is that bad times are forcing the 17 EU nations that use the euro currency to move ever closer toward some kind of United States of Europe _ one that could make decisions about how much member countries spend and how much tax they collect. If ever Britain had a nightmare, that's it. (AP Photo/Kirsty Wigglesworth) less