After the shooting, the police tallied 15 dead (including the shooters) and 21 wounded. Most people thought it couldn't have possibly been worse. But...
It was found out days after the shooting during the investigation that Dylan and Eric never intended to storm the school; they had planted propane bombs in the cafeteria that were set to go off shortly after lunch had started. The ensuing fires would've inevitably forced students out of the side exits, at which point Dylan and Eric would've gunned them down. The death toll would've been much higher had the propane bombs gone off. Thankfully, they didn't.*
The shooting - as terrible as it was - lead to increased security in schools and new protocols added in every North American school, lest that sort of thing happen again (For instance, schools now have a "lockdown" policy - in the event that a shooter or other threatening party enters the building, all the classrooms lock their doors and do not open them until an official announcement comes over the loudspeakers).
* - One of the propane bombs placed in the cafeteria actually did go off, but only after one of the shooters shot it.
Wikipedia has detailed information on the Columbine shooting including the incident, the aftermath and those responsible for it. The Huffington Post also has detailed accounts of the incident and videos of news bulletins can be seen on YouTube.
The Columbine High School shooting occurred on April 20, 1999.
Super Columbine Massacre RPG
Columbine High School, Littleton, Colarado
eric harris and Dylan klebold
A total of 24 people were wounded in the Columbine High School shooting on April 20, 1999.
The Columbine High School shooting took place on April 20, 1999.
The massacre took place on 4/20/99 at Columbine High School in Littleton, Colorado.
Frank DeAngelis
yes
Columbine, Colorado
Jefferson County.