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Originally Posted by devilincarnate
Yes iknow but who knows what they use
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I don't know but I imagine it's a combination of ground-level intelligence from people positioned in communities marked as possibly dangerous and data from ISPs into the people of interest. They probably also know sites where extremists might gather and look into that as well as people ordering suspicious amount of material which could be used to make explosives. I don't think they google 'Afghanistan'