Engineers have been building bridges for hundreds of years. But are better designs, techniques, and materials available today? This month, Minnesota's Department of Transportation picked a design for the new Interstate 35W Bridge, to replace the one that collapsed nearly three months ago. In this segment, Ira and guests talk about what it takes to build high-performance structures. We'll take a look at the winning design and talk with engineers about how they're making bridges safer. We'll also get an update on the investigation into what caused the August 1st bridge collapse.
Produced by Karin Vergoth