Since the 35W bridge collapse last week, there's been a lot of attention on how, and how often, bridges are inspected. As investigators look for the causes of the collapse of the Minneapolis bridge, engineers around the country will continue their inspections, hoping to find evidence that could prevent the next bridge failure. Finn Hubbard is the state bridge engineer for the State of Wisconsin. In his career, he's performed bridge inspections. Earlier, he told us how bridge engineers actually check out the underside of major bridges.