Columbine effect
The Columbine effect is the legacy and impact of the Columbine High School massacre ("Columbine"), which occurred on April 20, 1999, at Columbine High School in Columbine, Colorado. The shooting has had an effect on school safety, policing tactics, prevention methods (including gun control and metal detectors), and inspired numerous copycat crimes, with many perpetrators taking their inspiration from Eric Harris and Dylan Klebold by describing the two perpetrators as martyrs or heroes and imitating their methods or outward styles.