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25 years after Columbine, school lockdown drills are common. Students say they cause anxiety and fear — and want to see change.

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25 years after Columbine, school lockdown drills are common. Students say they cause anxiety and fear — and want to see change.

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25 years after Columbine, school lockdown drills are common. Students say they cause anxiety and fear — and want to see change.

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