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Preliminary findings from U.S. Steel suggest what may have caused deadly Clairton Coke Works explosion

U.S. Steel released preliminary findings about the potential cause of Monday's deadly explosion at U.S. Steel Clairton Coke ...

Gas valve failure during routine maintenance work likely led to explosion at coke plant, US Steel says

U.S. Steel says preparations for a routine maintenance task may have led to an explosion at a U.S. Steel coal-processing ...