jonathan metzl, why is it a crazy idea? >> blew me say first of all in the aftermath of mass shootings, it is understandable to me why the question of mental illness comes up because these shootings are so terrorizing, so spectacular that we asked a very important question, which is, what would cause somebody to go over the edge when there are some and responsible citizens and gun owners in the world? in that sense, i think we do leararn a lot from the mental health histories of mass shooters. policy levelas a as the height of your response ability to do a president trump did yesterday, which is to make the discourse about mental health. on the statistical level, people with mental illness, first of all, are far less likely than sane people to commit gun crimes. even in the case of mass shootings, what we see is even though we jump to this question of mental illness right away, many other factors are probably more explanatory, everything race, thel networks, access of firearms. and that sense, these are collocated policy qu