Community members in suburban Denver marked the 20th anniversary of the Columbine High School shooting Saturday by volunteering at shelters, doing neighborhood cleanup projects and laying flowers and cards at a memorial to the 13 people killed.

A young Florida woman who traveled to Colorado and bought a shotgun for what authorities feared would be a Columbine-inspired attack just days ahead of the 20th anniversary was found dead Wednesday in an apparent suicide after a nearly 24-hour manhunt.

It's been 20 years, but the word Columbine still brings up painful and scary memories for parents and students alike.

Six students could now be charged in a "Columbine-style" plot against Carver Middle School in Scotland County, according to deputies.

Just hours after the nation's latest school shooting, the debate began anew: Are American schools built in a way that makes them easy targets? Are there too many windows, too many entrances and exits and too few security features?

Students we heard from say they are protesting because they do not feel safe going to school.