Changes

  |motive      = Unknown, but it looked like Harris had [[psychopathy]], Klebold had [[Major depressive disorder|depression]], and possibly [[terrorism]]

  |motive      = Unknown, but it looked like Harris had [[psychopathy]], Klebold had [[Major depressive disorder|depression]], and possibly [[terrorism]]

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The '''Columbine High School massacre''' was a [[school shooting]] and [[attempt]]ed [[improvised explosive device|bombing]] at Columbine High School in [[Littleton, Colorado]], near [[Denver, Colorado|Denver]], that happened on April 20, 1999. Eighteen-year-old [[Eric Harris]] and 17-year-old [[Dylan Klebold]] carried out the massacre and were both students at the school. They [[mass murder|murdered 12]] students and one teacher using [[firearm|guns]]. Ten of the [[murder]]s happened in the school's [[library]], where they then [[suicide|killed themselves]] with their guns. Before the shootings, they had planted two large [[propane]] [[improvised explosive device|bombs]] in the school's cafeteria. They could have killed many people in there, but they did not [[explode]]. They also planted two [[car bomb]]s in the school's parking lot, which were supposed to kill [[first responder]]s and [[news reporter]]s. They also did not explode. They also carried [[pipe bomb]]s and [[molotov cocktail]]s, which they lit and threw. Most of them exploded but nobody was injured or killed by any of the bombs used during the [[massacre]].

The '''Columbine High School massacre''' was a [[school shooting]] and [[attempt]]ed [[improvised explosive device|bombing]] at Columbine High School in [[Littleton, Colorado]], near [[Denver, Colorado|Denver]], that happened on April 20, 1999. 18-year-old [[Eric Harris]] and 17-year-old [[Dylan Klebold]] carried out the massacre and were both students at the school. They [[mass murder|murdered 12]] students and one teacher using [[firearm|guns]]. Ten of the [[murder]]s happened in the school's [[library]], where they then [[suicide|killed themselves]] with their guns. Before the shootings, they had planted two large [[propane]] [[improvised explosive device|bombs]] in the school's cafeteria. They could have killed many people in there, but they did not [[explode]]. They also planted two [[car bomb]]s in the school's parking lot, which were supposed to kill [[first responder]]s and [[news reporter]]s. They also did not explode. They also carried [[pipe bomb]]s and [[molotov cocktail]]s, which they lit and threw. Most of them exploded but nobody was injured or killed by any of the bombs used during the [[massacre]]. They shot outside killing 2 student and then went inside where they shot killing 1 teacher then went inside the library where they killed 10 students then walked about the school into the cafeteria through the school again then back into the cafeteria again before going into the library and committing Suicide.

It was one of the first well-known massacres at a school in the [[United States]], and the one with the most deaths until the [[Virginia Tech massacre]] in 2007.

It was one of the first well-known massacres at a school in the [[United States]], and the one with the most deaths until the [[Virginia Tech massacre]] in 2007.