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 wrongful death suit against the Harrises and Klebolds. In 2000, youth advocate Melissa Helmbrecht organized a remembrance event in Denver featuring two surviving students, called "A Call to Hope." The library where most of the massacre took place was removed and replaced with an atrium. In 2001, a new library, the HOPE memorial library, was built next to the west entrance. On February 26, 2004, thousands of pieces of evidence from the massacre were put on display at the Jeffco fairgrounds in Golden. A permanent memorial "to honor and remember the victims of the April 20, 1999 shootings at Columbine