ALTOONA, Pennsylvania — In the heart of Blair County, the steady rumble of the tracks is more than mere background noise. It is the economic heartbeat of a community that built the backbone of America.

Gathered at the Rose Yard here are thousands of grandparents, grandchildren, and weathered rail workers watching the thunderous return of Union Pacific’s historic Big Boy No. 4014 locomotive. The event marks a celebration of American ingenuity and grit, and served as the backdrop for a deeper conversation about where the nation’s supply chain is heading–and where it comes from.