[G7 Treasury Ministers warn of US debt crisis: global Economic uncertainty will intensify] Finance Ministers of the G7 Group concluded a three-day meeting and warned of the US debt crisis, saying that uncertainty in the global economy would increase as a result. G7 finance ministers believe the outlook for the global economy has been overshadowed by high inflation, the collapse of US banks and the US debt crisis. U.S. Treasury Secretary Yellen says she will meet with senior Wall Street banking experts next week to discuss the possibility of the United States defaulting on its debt for the first time since 1789.