Mother of Columbine shooter on the son she thought she knew

Eric Harris and Dylan Klebold walked into Columbine High School in April 1999 carrying guns and homemade pipe bombs. Within an hour, 12 students and a teacher were dead, and 24 others injured. Seventeen years later, Dylan’s mother Sue writes of a son she thought she knew in her new book, “A Mother’s Reckoning.” Sue Klebold joins Jeffrey Brown to discuss her life in the shadow of tragedy.