The four most useful lessons of Columbine

The four most useful lessons of Columbine. – By Dave Cullen – Slate Magazine:

“The Secret Service and U.S. Department of Education studied every American school shooting from 1974 to 2000—37 separate attacks—and reached the same conclusion. Shooters came from all ethnic, economic, and social classes. Most had no history of violence and came from solid, two-parent homes.”

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