In the last five years, U.S. Steel has paid more than $10 million in penalties for violations of the Clean Air Act at Clairton.

Channel 11 spoke exclusively with United Steelworkers Local 1557 Vice President Richard Tikey, sharing his reaction to new details in the investigation into the deadly explosion at the Clairton Coke Works.

The large turnout was a reflection of the deep sense of loss and growing anger over unsafe conditions at the U.S. Steel plants.

The health department began deploying mobile air units Thursday provided by Pennsylvania’s Department of Environmental Protection and Carnegie Mellon University. The units will travel around Clairton to test for dozens of hazardous air pollutants.

Authorities on Thursday identified the second person who was killed in an explosion at U.S. Steel’s Clairton Coke Works Monday. Steven Menefee, 52, died at the steel plant Monday, authorities said. The explosion at Clairton Coke Works,

Clairton, Pennsylvania was rocked Tuesday by an explosion at the U.S. Steel Clairton Coke Works. Clairton Mayor Richard Lattanzi reflects on the sad day.

The first thing Andrew Macey thought about as he arrived at work at the Clairton Coke Works on Tuesday morning were the cars that remained.

Regulators are temporarily stepping up pollution monitoring in the Mon Valley after a deadly explosion at U.S. Steel’s Clairton Coke Works on Monday sparked worry about the release of toxic gases. The