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5hon MSN
Gas valve failure during routine maintenance work may have led to fatal explosion, US Steel says
Preparations for a routine maintenance task may have led to an explosion at a U.S. Steel coal-processing plant near ...
The deadly blast at the U.S. Steel facility outside Pittsburgh was just the latest in a series of recent workplace accidents.
An explosion at a U.S. Steel coking plant near Pittsburgh has left people trapped under the rubble. Here's what we know.
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