The fatal explosion last week at U.S. Steel's Pittsburgh-area coal-processing plant has revived debate about its future just ...

A Mobile Air Unit provided by the Pennsylvania Department of Environmental Protection and Carnegie Mellon University made several stops in the Mon Valley Thursday and Friday, monitoring the air ...

The fatal explosion last week at U.S. Steel’s Pittsburgh-area coal-processing plant has revived debate about its future just as the iconic American company was emerging from a long p ...

A deadly explosion at U.S. Steel’s Clairton Coke Works near Pittsburgh has killed two workers and injured ten others after a ...