@AnswerMan, my parents were from the Pittsburgh area, and I remember them talking about the final years of the steel industry there. My dad left Pennsylvania for Ohio when the employment focus shifted from raw steel production to the automotive industry. When the steel plants shut down, their hometown looked like a ghost town. There really was no other industry to take the place of steel production during the late 70s and early 80s. Pittsburgh survived by attracting investors in the medical field.
Pittsburgh is a very interesting city to visit, with a lot of ethnic neighborhoods and traditions. Natives of Pittsburgh also have their own "language" called Pittsburghese. The elastic loop used to hold papers together is not a "rubber band", for instance. In Pittsburghese, it's a "gum band".