What happens when a country with a big foreign debt defaults? That's the question hanging over Greece. On a much bigger scale, it's a question some people fear is hanging over the U.S. Argentina may have the answers. In the 1990s and early 2000s, Argentina had hyperinflation, high unemployment, economic contraction, a run on the banks and a mounting national debt. Robert Siegel talks to former Argentine Bank president Martin Redrado about what lessons Argentina can offer Greece regarding its financial crisis.