by Lynn Vincent
Cover Story | The high-school massacre in Colorado marks the latest-and most vicious and deadly-student attack in the public schools since the December 1997 murders in Paducah, Ky. With a dark sense of humor and no sense of mercy, two teenagers moved through Columbine High School and cut down classmate after classmate with bullets and bombs. As one mother put it, "You just want to hear, 'it's over.'"