Columbine High School massacre "Christianity is YOUR Columbine". In a self-made video recording sent to the news media by Seung-Hui Cho prior to his committing the Virginia Tech shootings, he referred to the Columbine massacre as an apparent motivation. In the recording, he wore a backwards baseball cap and referred to Harris and Klebold as "martyrs." Adam Lanza, the perpetrator of the Sandy Hook Elementary School shooting had "an obsession with mass murders, in particular the April 1999 shootings at Columbine High School in Colorado." The perpetrator of the Emsdetten school shooting praised Harris in his diary. In November 2007, Pekka-Eric Auvinen imitated Columbine
Columbine High School massacre the staircase where the massacre began was in fact their preferred spot to wait for the bombs to go off. On Tuesday morning, April 20, 1999, Harris and Klebold placed two duffel bags each containing propane bombs in the cafeteria, set to explode at approximately 11:17 a.m, during the "A" lunch shift. Propane bombs were also placed in the cafeteria's kitchen. No witness recalled seeing the duffel bags being added to the 400 or so backpacks already in the cafeteria. The security staff at Columbine did not observe the bags being placed in the cafeteria, ostensibly because a custodian was