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Columbine shooter Dylan Klebold's mother says she is shaken by copycat massacres | Daily Mail Online
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My son, the Columbine high school shooter: 'a mother is supposed to know' | Columbine | The Guardian
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From a Loving Father Who Lost His Son in the Columbine Massacre 14 Years Ago - Moms Demand Action | Moms Demand Action
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