3/15/2020: On The Frontline, Children of Flint, King of the Road

There's new evidence of a long-term health impact on the children of Flint Michigan. Sharyn Alfonsi reports. Driverless trucks being tested right now on public roads. Jon Wertheim climbs aboard for a look at the very near future of transportation and technology that could eliminate as many as 300,000 jobs. Those stories on this week's "60 Minutes."