The next steps in the 35W bridge collapse investigation
August 3, 2007 - The next steps in the bridge investigation.Broadcast: Midmorning, 08/03/2007, 9:06 a.m.A former National Safety Transportation Board official and a structural engineer join Midmorning to talk about the investigation process into the bridge collapse, and what's been learned from past bridge failures. Guests: Jon Hanson: distinguished professor emeritus of Structural Engineering and Mechanics at North Carolina State University. He worked on several bridge failure investigations with Wiss, Janney, Elstner Associates, a forensic engineering firm. Barry Sweedler: is a partner with Safety and Policy Analysis International. During his 31 years with the National Transportation Safety Board, he was involved in several accident investigations, include TWA Flight 800.