Computer hardware with preinstalled software for providing augmented reality (AR) training related to high-risk / low-occurrence events, first responders, active shooter training, de-escalation training, emergency response and planning training, hazardous material response and containment training; head-mounted video displays for augmented reality; headsets; augmented reality headsets; downloadable computer programs using artificial intelligence for providing augmented reality (AR) training related to high-risk / low-occurrence events, first responders, active shooter training, de-escalation training, emergency response and planning training, hazardous material response and containment training; downloadable augmented reality software for providing augmented reality (AR) training related to high-risk / low-occurrence events, first responders, active shooter training, de-escalation training, emergency response and planning training, hazardous material response and containment training; downloadable computer software for providing training related to high-risk / low-occurrence events, first responders, active shooter training, de-escalation training, emergency response and planning training, hazardous material response and containment training