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  1. Wikipedia
    https://en.wikipedia.org/wiki/Columbine_High_School_massacre

    Columbine High School massacre - Wikipedia

    • The Columbine High School massacre, often simply referred to as Columbine, was a school shooting and attempted bombing that occurred on April 20, 1999, at Columbine High School in Columbine, Colorado, United States. The perpetrators, twelfth-grade students Eric Harris and Dylan Klebold, murdered twelve students and one teacher. Ten of the twel… See more

    Perpetrators

    Eric David Harris (April 9, 1981 – April 20, 1999) was born in Wichita, Kansas. The Harris family relocated often, as … See more

    Background

    In 1996, 15-year-old Eric Harris created a private website on America Online (AOL). It was initially to host levels (also known as WADs) Harris created for use in the first-person shooter video games Doom, Doom II, and … See more

    LocationColumbine, Colorado, U.S.
    DateApril 20, 1999 · 11:19 a.m. – 12:08 p.m. (MDT)
    TargetStudents and staff at Columbine High School, first responders
    Attack typeSchool shooting, mass shooting, mass murder, murder–suicide, arson, attempted bombing, shootout
    The People Behind the Horror
    The People Behind the Horror
    How Media Covered the Tragedy
    How Media Covered the Tragedy
    Weaponry

    In the months prior to the attacks, Harris and Klebold acquired two 9mm firearms and two 12-gauge shotguns. Harris had a Hi-Point 995 carbine with thirteen 10-round magazines and a Savage-Springfield 67H pump shot… See more

    The massacre

    According to the shooters' respective journals and video tapes, it is believed by investigators that the pair intended to detonate their propane bombs in the cafeteria at the busiest lunch hour, killing hundreds o… See more

    Crisis ends

    By 12:00 p.m., SWAT teams were stationed outside the school, and ambulances started taking the wounded to local hospitals. A call for additional ammunition for police officers in case of a shootout came at 12:20. Authorities … See more

    Immediate aftermath

    On the morning of April 21, bomb squads combed the high school. By 8:30 a.m., the official death toll of 15 was released. The earlier estimate was ten over the true death toll count, but close to the total count of wounded st… See more

    Motive

    The shooting was planned as a terrorist attack that would cause "the most deaths in U.S. history", but the motive has never been ascertained with any degree of certainty. In a letter provided with the May 15 report o… See more

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    Background
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    Weaponry
    The massacre
    Crisis ends
    Immediate aftermath
     
  1. History
    https://www.history.com/topics/1990s/columbine...

    Columbine High School Shooting: Victims & Killers | HISTORY

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    Columbine High School shooting: 13 dead, dozens hurt in 1999 massacre
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    Columbine High School shooting: 13 dead, dozens hurt in 1999 massacre
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    Columbine High School shooting: 13 dead, dozens hurt in 1999 massacre
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    Boy, 13, interested in Columbine massacre took air rifle and axe to school with 'hit list' of ...
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    Columbine High School Shooting Crime Scene Photos Library
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  3. Britannica
    https://www.britannica.com/event/Colu…

    Columbine High School shootings | Date, Shooters, …

    Oct 31, 2024 · Columbine High School shootings, massacre that occurred on April 20, 1999, at Columbine High School in Littleton, Colorado, leaving 15 dead, including the two students responsible for the attack. It was one of the …

  4. The Vault
    https://vault.fbi.gov/Columbine High School

    FBI Records: The Vault — Columbine High School

  5. Slate Magazine
    https://slate.com/news-and-politics/2004…

    At last we know why the Columbine killers did it.

    Apr 20, 2004 · Five years ago today, Eric Harris and Dylan Klebold murdered their classmates and teachers at Columbine High School. Most Americans have reached one of two wrong conclusions about why they did it.

  7. All That's Interesting
    https://allthatsinteresting.com/columbin…

    Columbine High School Shooting: The Full Story …

    Mar 8, 2024 · Learn how Eric Harris and Dylan Klebold, two gifted and troubled students, planned and carried out the deadliest school shooting in American history in 1999. Explore their motives, backgrounds, and the myths and facts …

  8. Wikipedia
    https://en.wikipedia.org/wiki/Eric_Harris…

    Eric Harris and Dylan Klebold - Wikipedia

    Eric David Harris (April 9, 1981 – April 20, 1999) and Dylan Bennet Klebold (/ ˈkliːboʊld / KLEE-bohld; September 11, 1981 – April 20, 1999) were two American high school seniors and mass murderers who perpetrated the Columbine High …

  9. AP News
    https://apnews.com/article/columbine-a…

    25 years after Columbine, trauma shadows survivors of …

    Apr 18, 2024 · A rose stands at the plaque for Corey DePooter, one of the 12 student victims in the massacre at Columbine High School nearly 25 years ago, at the Columbine Memorial, Wednesday, April 17, 2024, in Littleton, Colo. …

  10. 4-20-99 a Columbine site
    http://www.acolumbinesite.com

    ACS - A Columbine Site - The Columbine High School tragedy

  11. History
    https://www.history.com/this-day-in-his…

    Teen gunmen kill 13 at Columbine High School

    Nov 13, 2009 · On April 20, 1999, two teenage gunmen killed 13 people and wounded 23 others at Columbine High School in Colorado. The shooting sparked a national debate on gun control and school safety, and left a lasting impact …