Article: Events that shaped Western Pennsylvania

From glaciers to steel, the history of Pittsburgh is built on a solid base.

There are many big events in the story of this area: George Washington's military defeat in 1754 to the emergence of commercial radio in 1920.

Historians and observers of the past listed below offered thoughts and discussions on the 20 top events in that development.

Perry Blatz, associate professor of history, Duquesne University

Ron Barafft, director of museum and archives, Rivers of Steel National Heritage Area.

Carmen DiCiccio, a Pittsburgh history expert at the University of Pittsburgh.

John A. Harper, a geologist with the state Department of Conservation and Natural Resources

Andy Masich, CEO of the Western ...

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