Flint removes thousands of lead pipes, but problems remain

It’s been more than a decade since the alarm was sounded about high levels of lead in Flint, Michigan’s tap water. This July, the city said it had completed the work of replacing as many as 11,000 lead pipes mandated by a 2017 settlement. But lead lines still remain in Flint and states across the country. Ali Rogin speaks with Erik Olson of the Natural Resources Defense Council for more.