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Now Playing: 03-27-12 Marketplace Morning Report

This week, we're looking at how new technology is changing the American workforce. The series is called 'Robots Ate My Job,' and David Brancaccio of our Economy 4.0 unit is driving across the country without interacting with a single human being. Today, a look at self-checkout at grocery stores. A couple of congressional panels will look at the Military's push into alternative energy. And Day Two of the Supreme Court arguments surrounding the new health care law begins.