Webmay 10, 1999 · one prone to fits of venomous temper, the other shy and awkward. Time investigates what led eric harris and dylan klebold to turn columbine high school into a. Webapr 26, 1999 · on tuesday, dylan klebold, 17, and his best friend, eric harris, 18, ambushed their classmates and teachers at columbine high school with a storm of.