Corey DePooter

Eric David Harris (April 9, 1981– April 20, 1999) was born in Wichita, Kansas.

The Harris family relocated often, as Harris's father was a U.S. Air Force transport pilot.

His mother was a homemaker.

Dylan Bennet Klebold (September 11, 1981– April 20, 1999) was born in Lakewood, Colorado.

His parents were pacifists and attended a Lutheran church with their children.

Both Dylan and his older brother, Byron, attended confirmation classes in accordance with the Lutheran tradition.

As had been the case with his older brother, Klebold was named after a renowned poet—in his case, the playwright Dylan Thomas.

Klebold attended Normandy Elementary in Littleton, Colorado for first and second grade before transferring to Governor's Ranch Elementary, and became part of the CHIPS ("Challenging High Intellectual Potential Students") program.

The family moved from Plattsburgh, New York, to Littleton, Colorado, in July 1993, when his father retired from military service.

The Harris family lived in rented accommodations for their first three years in the Littleton area.

During this time, Harris attended Ken Caryl Middle School, where he met Klebold.

In 1996, the Harris family purchased a house south of CHS.

Harris's older brother attended college at the University of Colorado Boulder.

In 1996, 15-year-old Eric Harris created a private website on America Online (AOL).

It was initially to host levels (also known as WADs) Harris created for use in the first-person shooter video games Doom, Doom II, and Quake.

On the site, Harris began a blog, which included details about Harris sneaking out of the house to cause mischief and vandalism, such as lighting fireworks with Klebold and others.

These were known as "Rebel Missions", and Harris's blog primarily consisted of "mission logs".

Beginning in early 1997, the blog postings began to show the first signs of Harris's anger against society.

By the end of the year, the site contained instructions on how to make explosives.

Harris's site attracted few visitors and caused no concern until August 1997, after Harris ended a blog post detailing murderous fantasies with "All I want to do is kill and injure as many of you as I can, especially a few people. Like Brooks Brown."

Brown was a classmate of his.

The Columbine High School massacre, commonly referred to as Columbine, was a school shooting and attempted bombing that occurred on April 20, 1999, at Columbine High School in Columbine, Colorado, United States.

The perpetrators, twelfth-grade students Eric Harris and Dylan Klebold, murdered twelve students and one teacher.

Ten of the twelve students killed were in the school library, where Harris and Klebold subsequently committed suicide.

Twenty-one additional people were injured by gunshots, and gunfire was also exchanged with the police.

Another three people were injured trying to escape.

Planning for a permanent memorial began in June 1999, and the resulting Columbine Memorial opened to the public in September 2007.

The shooting has inspired dozens of copycat killings, dubbed the Columbine effect, including many deadlier shootings across the world.

The word "Columbine" has become a byword for school shootings.

The Columbine massacre was the deadliest mass shooting at a K-12 school in U.S. history, until it was surpassed by the Sandy Hook Elementary School shooting in December 2012, and later the Uvalde school shooting in May 2022, and the deadliest mass shooting at a high school in U.S. history until the Parkland high school shooting in February 2018.

Columbine still remains both the deadliest mass shooting and the deadliest school shooting to occur in the U.S. state of Colorado.

Harris and Klebold, who planned for at least a year and hoped to have a large number of victims, intended for the attack to primarily be a bombing and only secondarily a shooting.

But when several homemade bombs they planted in the school failed to detonate, the pair launched a shooting attack.

Their motive remains inconclusive.

The police were slow to enter the school and were heavily criticized for not intervening during the shooting.

The incident resulted in the introduction of the immediate action rapid deployment (IARD) tactic, which is used in active-shooter situations, and an increased emphasis on school security with zero-tolerance policies.

Debates and moral panic were sparked over American gun culture and gun control laws, high school cliques, subcultures (e.g. goths), outcasts, and school bullying, as well as teenage use of pharmaceutical antidepressants, the Internet, and violence in video games and movies.

Many makeshift memorials were created after the massacre, including ones employing victims Rachel Scott's car and John Tomlin's truck.

Fifteen crosses for the victims and the shooters were erected on top of a hill in Clement Park.

The crosses for Harris and Klebold were later removed following controversy.