FILE - Students from Columbine High School are led away from the facility after two gunmen went on a shooting rampage, in the southwest Denver suburb of Littleton, Colo., April 20, 1999. Twenty-five years later, The Associated Press is republishing this story about the attack, the product of reporting from more than a dozen AP journalists who conducted interviews in the hours after it happened. The article first appeared on April 22, 1999. (AP Photo/David Zalubowski, File)