HARRISBURG, Pa. (AP) — The fatal explosion last week at U.S. Steel’s Pittsburgh-area coal-processing plant has revived debate ...

In the last five years, U.S. Steel has paid more than $10 million in penalties for violations of the Clean Air Act at ...

U.S. Steel said its investigation indicates the explosion happened when workers were flushing a gas valve in preparation for ...

U.S. Steel Clairton Coke Works' current limited coke-making capacity due to Monday's explosion is prompting concerns.

Workers were pushing coke out of huge ovens and preparing for maintenance when an explosion rocked a US Steel plant outside ...

The company defended its safety record as Investigators worked to determine the cause of the blast.

The cause of the blast is still unknown. The Pennsylvania plant has racked up fines and faced lawsuits over emissions problems.

The deadly explosions that happened Monday at U.S. Steel's Clairton Coke Works facility come following several different ...

An explosion rocked the U.S. Steel Clairton Coke Works facility near Pittsburgh Monday, leaving people trapped beneath the ...

Explosions at a U.S. Steel plant that shook the ground near Pittsburgh left two people dead and sent at least 10 to hospitals ...

Explosions at a massive United States Steel mill in Western Pennsylvania left two people dead and at least 10 injured, ...