Why horses are dying at U.S. racetracks at an alarming rate

The Belmont Stakes marked the end of the Triple Crown on Saturday, but the focus of horse racing this year is centered on a tragic statistic: an average of 10 horses a week died at American racetracks in 2018, a fatality rate that is two-and-a-half to five times greater than in the rest of the horse racing world. New York Times reporter Joe Drape joins Hari Sreenivasan to discuss.