Columbine High School massacre Potential Students") program. He found the transition to Ken Caryl Middle School difficult. Unlike the white caps of the jocks, Harris and Klebold wore black baseball caps. As was typical in the 1990s, they wore them backwards. Harris wore a KMFDM cap, and apparently did not wear it during the massacre. Klebold's cap had a Colorado Avalanche logo on the front and a Boston Red Sox logo sewn onto the back. Following the Columbine shooting, schools across the United States instituted new security measures such as see-through backpacks, metal detectors, school uniforms, and security guards. Some schools implemented school door
Columbine High School addition of the new HOPE Columbine Memorial Library and a memorial on the site. Columbine High School was the site of one of the deadliest mass shootings in modern United States history. The shootings occurred on April 20, 1999, when senior students Eric Harris and Dylan Klebold killed twelve students and a teacher, and wounded 24 others, before they both committed suicide. The massacre made headlines both nationally and internationally, making Columbine a household name, and causing a moral panic in U.S. high schools. It was the deadliest high school shooting in U.S. history until February 14, 2018, when 17