In 2018, a Chinese scientist shocked the world by unethically editing the genomes of two human embryos. What led to the medical scandal of the decade? I'll talk it over with genetics expert Dr. Kiran Musunuru, author of "The CRISPR Generation: The Story of the World's First Gene-Edited Babies." Plus: Who were the best and worst TV advertisers of 2019? Tim Winter, president of the Parents Television Council, will tell us on Friday's JANET MEFFERD TODAY.