The explosion this week at U.S. Steel's Pittsburgh-area plant has reignited debate about its future. The Clairton plant is part of a long-standing steelmaking tradition in the Mon Valley and ...

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

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