Cities that were built on iron, steel, and coal have had to overcome deep economic challenges and structural changes in recent decades. Both Dortmund and Pittsburgh have rebuilt themselves as thriving metropolises. However, the spread of COVID-19 is forcing cities to confront a new set of challenges. On August 7, the ACG hosted a second webinar with William Peduto, Mayor of Pittsburgh, and Ullrich Sierau, Mayor of Dortmund, who provided an update on how their cities have developed sustainable strategies to meet the challenges of structural change, a public health crisis, and diversity and inclusion in their communities – and how they are preparing for the future.