Three School Massacres That Predate Columbine

Mass shootings make headlines, in part, because they combine two basic fears: safety and crowds. Knowing what to do in a moment of crisis is hard enough — being able to do that when surrounded by panicking strangers is nearly impossible. If mass shootings are frightening, school shootings are downright terrifying. Shooting into a random crowd of people is difficult to understand; intentionally choosing a crowd…