U.S. refinery strike widens to include nation's largest plant

The U.S. refinery strike widened on its 20th day, with workers at the nation's largest refinery walking off jobs and joining picket lines on Saturday as the United Steelworkers union (USW) pushes for a new contract that improves wages and safety. The USW is seeking a three-year, industrywide pact that would cover 30,000 workers at 63 U.S. refineries that together account for two-thirds of domestic capacity.