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Now Playing: 4-04-13 Marketplace

Michigan's right-to-work law recently took effect. It's the latest blow to U.S. organized labor.  But there is one industry where union membership is actually growing. We take a behind-the-scenes look. Plus, the politics of the Keystone XL pipeline are heating up again. A recent spill in Arkansas has environmental activists saying, we told you so. Meanwhile, opponents in the President's own party are donating big money to oppose the pipeline. And what's the difference between a bone-in pork loin chop and a pork loin top loin chop? The meat industry doubts you know ... or care. In an effort to increase sales, it's about to roll out a new labeling system.