Twenty-three others were injured, and the two shooters -- Dylan Klebold and Eric Harris -- killed themselves.

CNN: Columbine seniors graduate under the shadow of shooting

In that incident, two teenage students, Dylan Klebold and Eric Harris, armed themselves with guns and bombs and shot people inside the high school.

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The profile also included a video tribute to the Columbine High School shooters, Eric Harris and Dylan Klebold, at the top of the man's favorites list.

CNN: Finnish gunman kills 10 at college