Even if another incident surpasses it with regard to body count, Columbine will remain seared into the public psyche as the archetypal school shooting.
Despite its unique status, despite the controversies it triggered (provoking arguments about guns, Marilyn Manson, bullying, and parental responsibility, among many other topics) and the subsequent incidents and near-incidents it inspired, many unanswered questions swirl around the events of April 20, 1999.