Now Playing: 10-03-13 Marketplace - Day Three

The impact of the government shutdown pales compared to a possible government default, and Chicken Little, a.k.a. the U.S. Treasury, launched a salvo by outlining the potential economic harm of political posturing in the debt-ceiling debate. Plus, with national parks closed during the shutdown, a lot of tourists have been left hanging.  A look at what businesses are willing to refund, or postpone – from airlines to whitewater rafting tours. And host Kai Ryssdal speaks with the World Bank president about the global economy and worries that many have about the shutdown risking the elusive "green shoots."