FILE - In this July 31, 2012, file photo, an employee works on a Passat sedan at the Volkswagen plant in Chattanooga, Tenn. Friday, Feb. 28, 2014, marks the end of the two-week period within which U.S. Sen. Bob Corker promised Volkswagen would announce another line at its factory in Tennessee if workers there rejected representation by the United Auto Workers union. So far there's little sign of any pending announcement. (AP Photo/Erik Schelzig, File)
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