Columbine Massacre: 20 Years Later

LITTLETON, Co. – Much has changed since 13 people died at Columbine High School in 1999. But the pain is still palpable for survivors, and shootings persist despite the rise in campus security.

Now, two decades later, survivors are reliving the horror they faced that day.

Natasha Chen shares their views on how columbine shaped future responses to school shootings.