After serving as a school principal, when the Sandy Hook Elementary School shooting  happened, I knew I would have tried to protect my students, just like Principal Dawn  Hochsprung was killed while trying to protect her students . Like educators across the country, I  watched in disbelief – and then with a growing sense of responsibility. We had invested heavily  in alarms, cameras, drills, and lockdown procedures, yet one painful truth remained: once a  threat is already inside a building, most school safety systems are designed to notify or respond  later, not physically intervene in the moment that matters most.  That realization stayed with me. I didn’t want to accept…