June 12th, 2014
10:21 PM ET

15 years after the deadly shooting, Columbine High School's principal is ready to retire

Frank DeAngelis was serving as Columbine High School's principal when a pair of students killed 13 people and themselves. DeAngelis vowed to stay in that job until every child in the district who wanted to graduated from Columbine. With that promise fulfilled, Frank DeAngelis is now ready to retire. He spoke to Anderson about the recent string of school shootings and how he handled the job for the last 15 years.

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Filed under: Columbine • School Shooting
December 13th, 2013
10:24 PM ET

Similarities and differences between the Arapahoe and Columbine school shootings

Only a few miles separate Columbine and Arapahoe High Schools. There are images from both tragedies that are eerily similar. The outcomes were very different for a variety of reasons. Dave Cullen spent about a decade researching and writing the book "Columbine."
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Filed under: Columbine