7/15/2018: The Monuments, Seaweed, Alma Deutscher

As debate over the takedown of Confederate monuments continues, Anderson Cooper examines why and when the statues went up in the first place. Lesley Stahl reports on a new type of farming -- with seaweed. Plus -- Scott Pelley introduces us to Alma Deutscher -- a 12 year old musician who is being called the "Second Mozart." Those stories on tonight's "60 Minutes." Learn more about your ad choices. Visit megaphone.fm/adchoices