Killing Spree at Columbine High School (1999): On April 20, 1999, two students of Columbine High School in Littleton, Colorado planted bombs and opened fire on students within their school. The boys, Dylan Klebold and Eric Harris, planned on killing hundreds during their killing spree and didn't succeed in killing such large numbers only because their bombs did not explode. However, before the boys killed themselves, they had murdered twelve students and one teacher. This was the first mass, student shooting on a U.S. campus and it shocked the entire country.
See full article: The Columbine Massacre
