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

Neighbors of U.S. Steel's Clairton Coke Works and the plants' workers react to the explosion at the plant on Monday that ...

U.S. Steel has released new details on what investigators believe caused the explosion at the Clairton Coke Works plant.

Flushing of a gas valve made during maintenance preparation may have led to the deadly explosion at the U.S. Steel Clairton ...

The Chemical Safety and Hazard Investigation Board’s probe into the deadly explosion at the Clairton Coke Works could take a ...

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

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

The deadly blast at the U.S. Steel facility outside Pittsburgh was just the latest in a series of recent workplace accidents.

U.S. Steel has released new details on what investigators believe caused the explosion at the Clairton Coke Works plant that ...

Allegheny County is boosting air monitoring after a deadly explosion at U.S. Steel’s Clairton Coke Works, a plant with a ...

The explosion happened when workers were flushing a gas valve in preparation for maintenance on two of the plant's coke oven ...