An explosion at a U.S. Steel plant south of Pittsburgh killed two people and injured 10 others. The CEO has vowed to find out what caused Monday's blast while union officials say representatives will ...

A second person has died after an explosion tore through a Pennsylvania steel plant on Monday, local officials have confirmed ...

An explosion at a U.S. Steel plant near Pittsburgh left one person dead and sent at least 10 to hospitals Monday and ...

Explosions at a U.S. Steel plant that shook the ground near Pittsburgh left two people dead and sent at least 10 to hospitals Monday.