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

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

Todd Barrett was with a crew of laborers at the Clairton coke works that morning when they all felt something. It was an explosion at batteries 13 and 14 at the plant. The batteries consist of dozens of tall,