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The so-called less lethal weapons are designed to break up mobs engaged in dangerous behavior or deter would-be assailants who pose a threat. They aren’t intended to kill. But research has shown the weapons can cause devastating injuries or death. Federal guidelines generally prohibit agents from targeting the head, neck, throat or spine when firing projectiles like rubber bullets or pepper balls. Above: Federal agents target protesters with “less lethal” weapons at an ICE building in Oregon in October.