An explosion at a steel plant near Pittsburgh has killed one person and left dozens of others injured as emergency responders race to free those trapped under rubble.Video captured a massive black ...

An explosion at a U.S. Steel plant near Pittsburgh left one dead and dozens injured or trapped under the rubble Monday, with emergency workers on site trying to rescue victims, officials said. The ...

An explosion at a U.S. Steel plant near Pittsburgh left dozens injured or trapped under the rubble Monday, with emergency workers on site trying to rescue them, officials said.