columbine high school massacre
On April 20, 1999, a school shooting and attempted bombing occurred at Columbine High School in Columbine, Colorado, United States. The perpetrators, twelfth-grade students Eric Harris and Dylan Klebold, murdered 13 students and one teacher; ten were killed in the school library, where Harris and Klebold subsequently died by suicide.
It is still considered one of the most infamous massacres in the United States for inspiring many other school shootings and bombings; the word Columbine has since become a byword for modern school shootings. Columbine is still both the deadliest mass shooting and school shooting in Colorado, and one of the deadliest mass shootings in the United States.