How can flood-ravaged Ellicott City hold back the water?

Climate change has profoundly affected Ellicott City, Maryland. The mill town, located where multiple waterways converge, was devastated by a flood earlier this year, after already suffering a deadly deluge in 2016. John Yang and a team from the University of Maryland's Capital News Service explain the debate over whether destroying Ellicott City's historic buildings could help save the town.