Columbine High School 1999 Teen gunmen kill 13 at Columbine High School
On April 20, 1999, two teenage gunmen kill 13 people in a shooting spree at Columbine High School in Littleton, Colorado, south of Denver. At approximately 11:19 a.m., Dylan Klebold, 17, and Eric Harris, 18, dressed in trench coats, began shooting students outside the school before moving inside to continue their rampage. By 11:35...