U.S. Steel says its preliminary investigation found that the blast happened after pressure built up while a gas valve was ...

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

“Pressure built inside the valve, leading to valve failure and coke oven gas filling the area and ultimately exploding when ...

KDKA's Megan Shinn takes a look back at the news of the week, including the explosion at the U.S. Steel Clairton plant, the ...

Hurricane Erin weakened to a Category 3 storm with maximum sustained winds of 125 mph while its outer bands pounded the ...