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Now Playing: 02-01-12 Marketplace

Continuing our election coverage on The Real Economy, David Gura reports from Nebraska on how agricultural subsidies may change or disappear altogether as the country cuts spending and tightens budgets. Facebook finally files for its IPO. President Obama's plan to help struggling homeowners refinance their mortgages could affect more than the housing market. And Super Bowl Sunday -- and its entertaining ads -- are almost here. Kai Ryssdal talks to the creative director of the ad agency that worked on the Volkswagen Super Bowl ad for this year and last.