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  1. Columbine High School massacre - Wikipedia

    As of 2025, Columbine remains the deadliest mass shooting and school shooting in Colorado, the deadliest high school shooting to happen in the united states. Harris and Klebold, who planned …

  2. Columbine High School shootings | Date, Shooters, History,

    Dec 1, 2025 · Columbine High School shootings, massacre that occurred on April 20, 1999, at Columbine High School in Littleton, Colorado, leaving 16 dead, including the two students …

  3. Columbine High School Shooting: Victims & Killers | HISTORY

    Nov 9, 2009 · The Columbine shooting on April 20, 1999 at Columbine High School in Littleton, Colorado, occurred when two teens went on a shooting spree, killing 13 people and wounding …

  4. Columbine Massacre - Colorado Encyclopedia

    The Columbine High School massacre occurred on April 20, 1999 in Columbine, Colorado. The shooting was perpetrated by two students, Eric Harris and Dylan Klebold, who killed 13 people …

  5. Columbine High School Shooting: The Full Story Behind The …

    Mar 8, 2024 · On April 20, 1999, Eric Harris and Dylan Klebold killed 12 fellow students and one teacher at Columbine High School in Littleton, Colorado before shooting themselves.

  6. ACS - A Columbine Site - The Columbine High School tragedy

    Apr 20, 1999 · The facts about the Columbine High School shooting of April 20,1999 from the oldest Columbine archive. Information and photos of shooters Eric Harris and Dylan Klebold, …

  7. Overview - Columbine Memorial

    The site of the Columbine Memorial was dedicated and opened to the public on September 21, 2007 to honor and remember the victims of the April 20, 1999 shootings at Columbine High …

  8. Columbine High School Massacre - Homeland Security Digital …

    Apr 20, 1999 · Two subjects walked into Columbine High School in Littleton, Colorado and opened fire on both students and staff, as well as detonated explosive devices, some of which …

  9. Columbine High School Shooting - Encyclopedia.com

    On April 20, 1999, two students at Columbine High School in Littleton, Colorado , shot and killed twelve fellow students and a teacher and wounded twenty others before turning their guns on …

  10. Columbine High School Massacre | Research Starters - EBSCO

    Apr 20, 1999 · Over a 45-minute period, the shooters killed twelve students and one teacher while injuring more than twenty others before taking their own lives. The motivations behind the …