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Now Playing: 02-29-12 Marketplace

More dramatic developments in the scandal surrounding Rupert Murdoch's media empire, as Murdoch's son James Murdoch quit as News International's executive chairman. There's been a slight thaw in the icy relations between the U.S. and North Korea as the government there agreed to suspend its nuclear weapons programs in return for the resumption of U.S. food aid. Our new Wealth and Poverty desk hears from two small-business owners who are doing relatively well compared to their fellow Americans. And a Silicon Valley start-up says it has  a new battery that could greatly increase the range of electric cars -- and cut their price.