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 (book) tenth anniversary of the massacre, which occurred on April 20, 1999. The book spent eight weeks on "The New York Times" bestseller list in the spring of 2009, peaking at #3. The book gained considerable media attention for addressing many of the so-called Columbine myths widely taken for granted. According to the book, the massacre had nothing to do with school bullying, jocks, the Gothic subculture, Marilyn Manson or the Trench Coat Mafia. Cullen also writes that the attack was intended primarily as a bombing rather than a school shooting, and that Harris and Klebold intended to perpetrate the worst