Tragedy at Columbine
On Tuesday, April 20, 1999, two Columbine High School students shot and killed 12 of their classmates and one teacher - the largest school shooting in U.S. history. The Denver Rocky Mountain News recounts the horror of that incident, and the community's attempt to answer the question: Why?
Today's updates from the Associated Press
Mundane gave way to madness
Tens of thousands 'honor these children'
In hindsight, signs to killings obvious
The complete archive of stories from the Denver Rocky Mountain News
FBI backs agent with close ties to Columbine
'I'm getting better,' says student hurt in rampage
Teacher had concerns about Klebold's essays
Frightened students getting help
Students hear firsthand about rights abuses