feeling desperate, feeling like they need to engage in violencen tell us.steps to let us know, we cantake steps to help them and keep school safe at the same time. >> did new techniques develop after columbine in '99, i believe it was? >> yeah, they did. in large partrese because of research that the secret service and u.s. department of educatioo conducted on school shootings across america. i was fortunate to be part of that when it was conducted but it was ground of breaking and remains the largest federal study of school help s shootings across the u.s. and there were some surprising findings that helped schools do a much better job at figuring out when a student is planning to engage in violence because it's not impulsive. the schooln shootingsthe un we in the u.s. are thought out in advance and planned out in advance which means we have a chance to stop them to stop a student who has stoppen on what we call the pathway to violence. they're usually there because they have personal problems they're trying to solve and they resort to violence or see violence as the only option. whe