On April 20, 1999, Eric Harris and Dylan Klebold went on a shooting rampage at Columbine High School in Littleton, Colorado, killing 12 students and one teacher. More than 20 others were wounded.
[Ads /]
The pair made home videos prior to the attack making references to what they were going to do and apologizing to their parents for it.
[Ads /]
Harris and Klebold turned the guns on themselves after carrying out the attack.
More than 100 explosive devices were recovered from the scene.
Report a typo to the ABC13 staff