The name Klebold should ring a bell, but not a happy one.
Dylan Klebold and Eric Harris were the two Columbine High School students who shot and killed 13 people at the school in 1999; they wounded 24 others before killing themselves.
The crime itself is incomprehensible to most of us, perhaps more so for Sue Klebold, Dylan's mother. She wrote a book about her journey before and after Columbine, A Mother’s Reckoning: Living in the Aftermath of Tragedy.
The book is now out in paperback, with all profits going to research and charities working on mental illness. Sue Klebold shares her story with us.