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"The Day Ahead" spoke with Stanford professor and sociologist Mark Granovetter, who has a unique theory about mass shootings and why these tragedies seem to spread faster than the flu.
Are Mass Shootings Contagious?
It seems like every time we turn around, there is another mass shooting in an unthinkable place. But what if there was a way to predict them?
Are Mass Shootings Contagious?
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