After reviewing 31,000 bank “incidents” from 2007 to 2011, CIR determined “guards with guns” were “the strongest factor in whether the situation turned violent, and this held true even when controlling for other factors.” Most of the violence was focused on the guards themselves as those carrying firearms had an injury rate of 64 for every 1,000 incidents, “compared with less than 1 injury per 1,000 incidents when they were unarmed.”
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