On April 20, 1999, Columbine High School in Littleton, Colorado became the site of one of the most infamous school shootings in history. Seniors Eric Harris and Dylan Klebold carried out a meticulously planned attack, armed with firearms, explosives, and a desire to inflict mass casualties. Their plan originally centered on detonating propane bombs in the cafeteria to kill hundreds, but when the bombs failed, they began shooting indiscriminately. Over the course of less than an hour, they murder