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 plans and reasons for the massacre, including the ways they hid their arsenals and deceived their parents. Most of these were shot in the Harris family basement, and are known as the Basement Tapes. Approximately thirty minutes before the attack, they made a final video saying goodbye and apologizing to their friends and families. In December 1999, before anybody else had seen them, Time magazine published an article on these tapes. The victim's family members threatened to sue Jeffco. As a result, select victim families and journalists were allowed to see them, and they were then kept from the public