There is a memorial near Columbine High School in Colorado where 17 years ago this week, two high school students killed 13 people and injured 24 others before taking their own lives.
Carved in stone, the memorial reads "It brought the nation to its knees, but now that we've gotten back up, how have things changed; what have we learned?
This year, Sue Klebold, the mother of shooter Dylan Klebold, searches for elusive answers about her own son in a new memoir.
Anne Marie Hochhalter was having lunch outside when she was shot twice. Once in the back, and in her stomach. She is in a wheelchair and has continuing health problems. She has learned to let go of bitterness. When the Klebold book came out, she wrote an open letter to Sue offering her forgiveness.