The deadly explosion at Clairton Coke Works near Pittsburgh occurred when a gas valve was flushed before planned maintenance, ...

HARRISBURG, Pa. (AP) — Preparations for a routine maintenance task may have led to an explosion at a U.S. Steel ...

The preliminary findings say how the company believes the explosion occurred. A union statement cautioned the investigation is in its early stages.

Allegheny County is increasing air quality monitoring after an explosion at a U.S. Steel plant south of Pittsburgh killed two ...

Preparations for a routine maintenance task may have led to an explosion at a U.S. Steel coal-processing plant near ...

When horrific situations strike in the Pittsburgh area, such like the U.S. Steel Clairton coke plant explosion that killed ...

A Monongahela business launched a fundraiser to benefit employees of the U.S. Steel Clairton Works after Monday’s explosion ...

Test your knowledge of the week’s events as reported in The Wall Street Journal.