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Now Playing: 2-12-13 Marketplace

President Obama will give his State of the Union speech tonight. North Korea tests another nuclear weapon, but how can the impoverished country afford to be a nuclear state? Leaders of the International Olympic Committee have dropped wrestling from the 2020 games. Dan Gorenstein takes a look into the profits made by stores that cater to doomsday preppers and bad weather survivalists. Author Jess Walters talks about his new series of stories that delves into the recession-era America. And Sylvester Monroe reports from Chicago, on the eruption of violence in the city.