<human>:  I have a question about pop culture. How many people were killed in the Columbine High School shooting?
<bot>: There were 13 people killed in the Columbine High School shooting. The shooting took place on April 20, 1999, at Columbine High School in Littleton, Colorado. The two shooters, Eric Harris and Dylan Klebold, killed 12 students and one teacher before committing suicide.