 In December 2001, the Argentinian government defaulted on $155 billion in public debt. Since then, this once-wealthy country has gone through five presidents and watched its currency fall by more than 70 percent. How do people survive in a broken economy? The solutions range from the ingenious -- barter clubs where members can exchange goods and services without money -- to the brutal, including outbreaks of rioting. With the most basic government services now only a memory and the army camped around the capital, how can the people of Argentina begin to put their society back together? What does a financial meltdown look like? And where do American interests or responsibilities lie?