More Columbine features
A look back at the April 20, 1999, shootings at Columbine High School in Littleton, Colo.
Where are they now?
What is injured Columbine student Sean Graves doing now? Find out what has happened to him and other figures from the tragedy. Click "Launch" to view.
Lesson for all
April 19: NBC’s Lester Holt sits down with five former Columbine students who are uniquely qualified to teach the lessons of that terrible day.
Columbine changed me
April 19: Craig Scott, whose sister was killed at Columbine, discusses his memories of the fateful day.
The ‘darkest day of my life’
April 19: The Rev. Michael Shoels, whose son Isaiah was killed at Columbine, reflects on the shootings.
City in Fear: Columbine
On April 20th, 1999, the quiet suburban community of Littleton, Colo., became the scene of one of the most horrific crimes in our nation’s history. The entire country was shocked and saddened by the terrifying events at Columbine High School that day — and left wondering if anyone, or any place, is truly safe.