Silence Broken: A Mother's Reckoning

Sue Klebold, mother of Columbine shooter Dylan Klebold, gives her first television interview nearly 17 years after the tragedy. She talks about her relationship with her son, about the victims, and about what happened inside her home leading up to the Columbine shooting. Diane Sawyer examines teenage mental health, warning signs of a child in crisis, and the possibility of preventing the next school shooting.