Maternal and fetal medicine specialist Dr. Yvonne Thornton discusses the death of an Olympic sprinter, which is shining a light on racial disparity in medicine. SUBSCRIBE to ABC News on YouTube: bit.ly/2vZb6yP Latest updates: abcnews.go.com Watch FULL EPISODES on Hulu: abcn.ws/3bzvQQn #news #olympics #maternalmortality #abcnews #health