It was on this day in 1999, two students at Columbine High School in Littleton, Colorado went on a shooting rampage. They killed twelve other students and a teacher before committing suicide.
It took a year for Eric Harris and Dylan Klebold to plan their attack, and illegally obtained the firearms from adults. At least two of those adults were subsequently sentenced to prison. In addition to the guns, the pair had constructed nearly one hundred bombs and exploded many of them during the morning of terror.
A candlelight vigil was at the Columbine Memorial in Clement Park in Littleton last night in honor of the 13 people killed at Columbine High School 10 years ago, on April 20, 1999.