A Letter from Philadelphia
When I grew up in Pittsburgh in the 1960s and ‘70s, for a time it had the third-largest concentration of corporate headquarters in the U.S. with US Steel, Mellon Bank, Alcoa, H.J. Heinz, Koppers, Rockwell, Dravo, Westinghouse, and others. Since then, Pittsburgh has seen many changes, some anticipated, others completely new and unexpected. But I …