Clairton, U.S. Steel and Coke Works
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Flushing of a gas valve made during maintenance preparation may have led to the deadly explosion at the U.S. Steel Clairton Coke plant.
4don MSN
Video shows steel workers scrambling into wreckage left by explosion that killed 2 in Pennsylvania
By the time the scene was secure, two people were dead and more than 10 others were injured, including one who spent hours trapped in rubble left Monday by the blast that was powerful enough to shake nearby homes.