Reuters - How long can the U.S. dollar defy gravity?

"As the United States racks up staggering deficits and the centre of economic activity shifts to fast-growing countries such as China and Brazil, these sources fear the United States faces the risk of another devaluation of the dollar. This time in slow motion -- but perhaps not as slow as some might think."

and

"We are plainly overextended in our budgetary terms and in our dependence on foreign capital; we resort to the kindness of strangers to meet our deficits," said former Federal Reserve Chairman Paul Volcker at an Economic Club of New York speech last month. Volcker is now head of President Barack Obama's Economic Recovery Advisory Board. "

Read the full article:  How long can the U.S. dollar defy gravity?