for violent extremism or support for or obsession about other people who have committed violent acts, absolutely, that adds up. >> i do wonder, do you think the tragedies like in el paso and dayton, do you think it has made people more vigilant so they are reporting more, or do you think as we've heard -- we've heard in the past the fear after tragic mass shootings of a copycat effect after mass shootings. do you think either one is at play here? >> i think, yes, i think that's a good observation, kate. certainly there's limited research, but there is research that shows that a contagious effect and when an isnncident occurs, we're more likely to see a copycat. and then the idea of obsessing over whether or not somebody else has done it and i want to do it, too, and i wapt to be like him, i want to be like mike