More than a month after the deadly U.S. Steel Clairton plant explosion, investigators are revealing new insight into how it ...

U.S. Steel previously said an investigation done by a third party shows that as a gas valve was being flushed, too much pressure built up, causing the valve to fail. That in turn led to coke oven gas ...

The vivid memories of April 17, 2013, have not faded for Joe Pustejovsky. “The disaster that was obvious that day is what sticks in my mind, then the realization that Joey was there,” Pustejovsky said ...

The U.S. Chemical Safety and Hazard Investigation Board provided an update Monday on its investigation into the fatal U.S.