Japanese teachers recently subdued and immobilized a knife-wielding intruder using a variation of the traditional, two-pronged Sasumata. The incident highlights this ancient fighting weapon in its modern iteration as a non-violent, noninvasive, ?Man-Catcher? school safety device.Source: http://inventorspot.com/articles/teachers_expel_school_intruder_twopronged_people_pusher
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