Why what's in the water still haunts residents of Flint

Since 2014, Flint, Michigan, has been synonymous with tainted water. Five years on, not all of the city's residents have access to safe water. Some wait for hours in line to obtain bottled water, while others deal with the physical and emotional fallout of exposure to high lead levels from corrosion of city pipes. John Yang reports from Flint on what has changed -- and what hasn’t.