Think Greece and Spain are drowning in debt? Look a little closer to home. Seven U.S. cities recently had their municipal bonds downgraded below investment grade. Their debt is now, junk, considered more worthless than that of the so-called PIIGS.

Think Greece and Spain are drowning in debt? Look a little closer to home. Seven U.S. cities recently had their municipal bonds downgraded below investment grade. Their debt is now, junk, considered more worthless than that of the so-called PIIGS.