US Debt Will Keep Growing Even With Recovery

Carmen Reinhart, an economics professor at the University of Maryland and a former IMF official, suggested the nation's fast-growing indebtedness may not have a visible impact at this point on ordinary Americans. But some day it will pounce.

"One thing we can say with a fair amount of certainty," she said. "We never know when the wolf will be at our door. The wolf is very fickle and markets can turn very quickly. And a high debt level makes us very vulnerable to shifts in sentiment that we cannot predict."