The echoes of Columbine: A timeline of school massacres and foiled plots

Columbine "defined the social category of a rampage school shooting." And it continues to inspire a troublingly large number of copycats.

Columbine memorial
(Image credit: REUTERS)

Nearly 15 years ago, Eric Harris and Dylan Klebold carried out a highly orchestrated massacre at their high school in Columbine, Colo. Using military-grade artillery and homemade bombs, the teenagers killed 13 people and injured more than 20 others before turning the guns on themselves.

It was a horrible, watershed moment in U.S. history, and the terrifying incident became a benchmark for both future tragedies and would-be copycats. "It's the iconic shooting," Princeton University professor Katherine S. Newman told NBC News. "It defined the social category of a rampage school shooting."

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Lauren Hansen

Lauren Hansen produces The Week’s podcasts and videos and edits the photo blog, Captured. She also manages the production of the magazine's iPad app. A graduate of Kenyon College and Northwestern University, she previously worked at the BBC and Frontline. She knows a thing or two about pretty pictures and cute puppies, both of which she tweets about @mylaurenhansen.