Will the water in Flint, Michigan, ever be safe again?

This week, the mayor of Flint, Michigan, declared a state of emergency after tests found that the elevated lead levels in the city's water has found its way in the bloodstreams of local children. In this excerpt of a special two-part report from America Tonight, Lori Jane Gliha looks at whether the water in Flint can return to normal levels and asks the head of the Michigan's water quality authority how it allowed the water to become contaminated at all.