The Columbine High School massacre was a school shooting that occurred on April 20, 1999, at Columbine High School in Columbine, Colorado.
The perpetrators were Eric Harris and Dylan Klebold. They murdered 12 students and one teacher and then committed suicide.
21 additional people were injured with gunfire. They also made bombs that were placed in the cafeteria.
Sue Klebold, (the mother of Dylan Klebold), talks openly about what it’s like for those left behind.