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Workers assemble Volkswagen Passat sedans at the German automaker's plant in Chattanooga, Tenn., on June 12, 2013. The automaker announced a new policy Wednesday that would allow interaction with labor unions at the plant. Erik Schelzig/AP hide caption

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Erik Schelzig/AP

Volkswagen's car plant in Chattanooga, Tenn., is the company's only one in the U.S. Its employees voted this week on whether to join the United Auto Workers union. Volkswagen hide caption

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