Joining us on this episode is Sue Klebold, mother of Dylan Klebold, one of the two Columbine High School killers.  Since the massacre in April,1999, Sue has lived with indescribable grief and shame of that day…and tried to understand how her son’s life could have escalated into such a disaster on her watch.  Sue has written about her quest to comprehend what happened in her book, "A Mother’s Reckoning:  Living in the Aftermath of Tragedy".