U.S. refinery strike widens to include nation's largest refinery
By Erwin Seba HOUSTON, Feb 21 (Reuters) - The U.S. refinery strike widened as workers at the nation's largest refinery walked off their jobs at 12 a.m. CST (0600 GMT) on Saturday, according to the United Steelworkers union (USW). Shortly after talks between union and oil company repre
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