Columbine High School massacre (2006): 18-year-old Eric Harris and 17-year-old Dylan Klebold, students at Columbine High School, killed twelve students and one teacher. They injured 21 additional people, and three more were injured while attempting to escape the school. The pair committed suicide at the end of the massacre. Red Lake shootings (2005): 16-year-old student Jeffrey Weise, killed... Continue Reading →