https://www.salon.com/1999/12/17/columbine_9/
Columbine High School shut down - Salon.com
Sep 25, 2011 - In the wake of new chat room threats and the release of the killers' videotapes, wary school officials cancel the last two days of class.
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https://en.wikipedia.org/wiki/Columbine_High_School
Columbine High School - Wikipedia
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https://extras.denverpost.com/news/col0624a.htm
The Columbine High School Tragedy: The Denver Post
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https://www.columbinehsrebels.com/
Columbine High School
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