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Fatal explosion at U.S. Steel's plant raises questions about its future, despite heavy investment

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

Gas valve failure during routine maintenance work may have led to fatal explosion, US Steel says

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