Modifications for police training, modifications for school systems, the idea of when the fire alarm goes off, you effectively leave immediately. notifications systems within the school. there's so much to learn from these, are you better off with locked door environments? or do you still want to have an open campus type of system? there's really no one size fits all answer to this. so since columbine, we have been wrestling with this now for 20-some-odd years, trying to keep in schools our children safe, our teachers safe, quite obviously we're not doing as good a job as we would like. >> for...