There have been dozens of shootings and other attacks in U.S. schools and colleges over the years, but until the massacre at Colorado's Columbine High School in 1999, the number of dead tended to be in the single digits. Since then, the number of shootings that included schools have killed 10 or more people has mounted. The most recent two were both in Texas
Share this article
If you liked this article share it with your friends.they will thank you later