It's been two years exactly since the Francis Scott Key Bridge here in Baltimore was hit by a container ship, the Dali, causing it to collapse. When it fell, the state lost a well-traveled highway that served commuters as well as truckers moving goods around the port of Baltimore. Now, the state is rebuilding the bridge. Marketplace’s Stephanie Hughes spoke with Jim Harkness, chief engineer for the Maryland Transportation Authority, about how the new bridge will incorporate new technology.