On April 20, 1999, Eric Harris and Dylan Klebold, high-school seniors at Columbine High School in Columbine, CO entered their school with guns and homemade bombs. They shot and killed 12 students and one teacher. An additional 21 people were injured in the shooting.
The killings began at 11:19 a.m. when Harris and Klebold opened fire on students eating lunch near the west entrance of the school. Rachel Scott (17), who was sitting with Richard Castaldo, was their first victim. Scott died immediately when she was hit by four bullets from Harris’ gun. Castaldo was hit eight times, but survived. However, he was left paralyzed below his chest because of his injuries. The two shooters then entered the school and began firing. They made their way to the cafeteria and finally to the library, where they claimed the majority of their victims. After leaving the library and roaming the halls of the school for almost 20 minutes. Harris and Klebold returned to the library and exchanged fire with responding police officers at 12:02 p.m. By 12:08, both Klebold and Harris had killed themselves.
The teenage assassins brought several homemade bombs with them and planted them around the school, but they failed to detonate. The intention was to kill all the people in the area. In addition to the 13 dead, the gunmen wounded another 24. At the time, Columbine was the deadliest school shooting in United States history. Their motive remains unknown.