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Global Shooting Incidents —
#155 —
Columbine High School Shooting (1999)
On April 20, 1999, a mass shooting took place at Columbine High School in Littleton, Colorado, United States. Two senior students carried out a planned armed attack inside the school, killing 12 students and one teacher, while injuring more than 20 others. The attackers later died by suicide. The incident unfolded over less than an hour but received extensive media coverage worldwide. Columbine became a turning point in how school violence was discussed, exposing issues related to bullying, access to firearms, mental health, and media influence. In the aftermath, schools across the United States and other countries reviewed security measures, emergency response protocols, and student threat assessment programs. The event remains one of the most referenced school shootings in modern history and continues to shape public debate on gun policy and youth violence prevention.
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