The Columbine High School Massacre occurred on April 20, 1999, in Littleton, Colorado. Two students, Eric Harris and Dylan Klebold, carried out a planned attack on their school, resulting in the deaths of 12 students and one teacher. The incident also left many others injured and shocked the nation, leading to discussions about school safety and gun control. In the aftermath, the tragedy prompted investigations into the motivations behind the attack, including bullying and mental health issues. The event has since influenced policies and practices in schools across the United States, aiming to prevent similar incidents in the future.