An armed guard watching Colorado's Columbine High School in 1999 was unable to prevent the slayings.
In the April 20, 1999, Columbine High School shootings, Harris and Klebold had clearly done significant planning.
After the Columbine High School shootings in 1999, Colorado lawmakers successfully introduced background checks for buyers at firearms shows.
Lawmakers debated firearms proposals after the Columbine High School shooting, and began requiring background checks for buyers at gun shows.
Columbine High School in Colorado, where two student gunmen killed 12 schoolmates and a teacher in 1999, reopened several months afterward.
Ever since the shootings at Columbine High School, in a Denver suburb, in 1999, American schools have been preparing for gunmen.
The 1999 shooting spree at Colorado's Columbine High School served as Grant Acord's benchmark and inspiration, Benton County District Attorney John Haroldson said.
ENGLEWOOD, Colorado (CNN) -- Columbine High School's class of 1999 graduated Saturday beneath a brightly lit spring sky -- and the glare of national television cameras.
CNN: Columbine seniors graduate under the shadow of shooting
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.
Strickland's surprisingly widespread recognition stemmed from his 1996 campaign against Allard and two years he spent as U.S. attorney following the 1997 shooting at Columbine High School.
Vice President Al Gore cast the deciding vote in the vote on the bill, which was debated after the shootings at Columbine High School in Littleton Colorado.
Columbine High School and Virginia Tech had armed officials present.
FORBES: Three Questions Progressive Gun Control Advocates Fear After Newtown
In the years since the murders at Columbine High School in 1999, Evan has spoken at hundreds of public and private high schools, colleges, churches, youth groups and more.
FORBES: A Columbine Survivor Tells President Obama To Man Up
After the Columbine High School shooting in 1999, Congress tried to close the loophole that lets unlicensed dealers sell guns at gun shows without background checks on their buyers.
Agonized parents braced for the worst as bodies remained inside Columbine High School while police scoured the building for potential bombs and booby traps in the aftermath of Tuesday's terror.
Frost, 62, served two terms as chair of the House Democratic Caucus, and in the wake of the shootings at Columbine High School he co-chaired the Bipartisan Working Group on Youth Violence.
The Aurora incident was about 16 miles from Columbine High School, where two students went on a shooting spree in April 1999, killing 13 people and wounding more than 20 others before committing suicide.
Families affected by the murders in Yellowstone Park, and terrorist attacks on Pan Am 103 and the Khobar Towers received help, as well as students and families affected by the Columbine High School shootings.
Olbrich and his colleagues ran several support groups after the shootings at Columbine High School in 1999, still the deadliest event at an American high school, in which 12 students and a teacher died.
Perhaps the most memorable case study was the Columbine High School shooting in Colorado in 1999, during which experts speculated about the influence of the game "Doom" on the teenagers who carried out that crime.
GAITHERSBURG, Maryland (CNN) -- Far from Columbine High School, where Colorado teens vented their anger with bombs and bullets, the troubled students at an alternative high school in Maryland are learning to overcome life's obstacles in a constructive way.
What I'll remember most vividly about Gus Van Sant's extraordinary " Elephan t" is not the violent climax -- his film is a fictional evocation of the shootings at Columbine High School -- but the state of grace that precedes it.
Officials found a piece of notebook paper "showing a diagram of the Columbine High School cafeteria with two X's next to the pillars, " and a list of how many people were there before and after the first lunch period, the sheriff's department said.
President Barack Obama has been waging a public pressure campaign for tougher gun laws, an effort he continued Wednesday in Colorado -- site of two of the nation's most notorious mass shootings, in 1999 at Columbine High School and last year at an Aurora movie theater.
The threat comes nearly a year after the shootings at Littleton, Colorado's, Columbine High School, and eight months after the one meeting of the conference committee charged with working out differences between the House and Senate versions of the juvenile-justice bill that contains the gun control provisions.
It spread to the country's schools in 1994, when President Clinton's Gun-Free Schools Act required them to suspend for a year all students caught bringing guns on to their premises, and has been gathering momentum ever since, particularly after the gruesome killings at Columbine High School in Littleton, Colorado earlier this year.
In 1999, several months after two students went on a shooting spree at Columbine High School, killing 13 people and wounding more than 20, President Bill Clinton asked the Justice Department and the Federal Trade Commission to study whether the entertainment industry was using irresponsible marketing practices to push violent content on teenagers and children.
WSJ: Warner Bros., Theaters Face Delicate Balancing Act After Colorado Shooting
The data covers some of the years between the two mass shootings in the Denver area -- the 1999 one at Columbine High School that resulted in 13 deaths and more than 20 injuries before the shooters took their own lives, and July's mass shooting at a movie theater in Aurora that killed 12 people and wounded 58.
Earlier Thursday, school officials announced that Columbine High, in suburban Denver, would be closed indefinitely.
应用推荐