Former gymnast Rachael Denhollander set off one of the largest investigations of its kind in U.S. history. She was the first to publicly accuse former USA Gymnastics team doctor, Larry Nassar, of abuse. More than 150 survivors later came forward and Nassar was sentenced to up to 175 years in prison. In her new book “What Is A Girl Worth?” Denhollander explains what led her to speak out against her abuser. She joins “CBS This Morning” to discuss the challenges and fears that still remain for victims of sexual abuse who speak out.