How a single collision could bring down 17,000 US bridges

Today, On Deadline is looking at last week’s bridge tragedy in Baltimore and whether or not Americans should be worried about the infrastructure around them. While other major pieces of infrastructure, like the Brooklyn Bridge and the Golden Gate Bridge, have stood for more than or nearly a century, some are beginning to wonder if the tragedy that befell Baltimore could happen in their own cities. 'On Deadline' is hosted and produced by Lauren Barry. It's also produced by Joe Hiti, Christy Strawser and Myron Kaplan. Sound design by Joe Hiti.