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We have studied every mass shooting since 1966. Here’s what we’ve learned

But we all can slow the spread of mass shootings by changing how we consume, produce, and distribute violent content on media and social media. Don’t like or share violent content. Don’t read or share killers’ manifestos and other hate screeds posted on the internet. We also need to study our current approaches. For example, do lockdown and active shooter drills help children prepare for the worst or hand potential shooters the script for mass violence by normalizing or rehearsing it?
-- Jillian Peterson and James Densley, LA Times