Pittsburgh is a town that (used to be) run by steel. Even a few decades after that dominance, this particular company is still a $4B one on the S&P 400. I'm pretty sure this is the company that my grandfather worked at for decades; his brother did from high school to retirement (except during World War II). They apparently significantly polluted the air in the high school district next to mine ten years ago.

It doesn't surprise me at all that they are still a part of infrastructure, somehow.