Last week's explosion at U.S. Steel's Clairton Coke Works has reignited debate about its future. The plant is part of a long-standing steelmaking tradition in the Mon Valley and faces uncertainty despite Nippon Steel's acquisition of U.S. Steel. The post Fatal explosion at U.S. Steel’s Clairton plant raises questions about its future, despite heavy investment appeared first on Pittsburgh's Public Source. PublicSource is a nonprofit news organization serving the Pittsburgh region. Visit www....