when you do an attack, contemporaneously, shortly before, shortly thereafter, pledge your allegiance to isis. when she pledged her allegiance to abu bakr al baghdadi, that was her saying i did this for you guys. that makes this the worst terrorist attack by a jihadist entity in the post-9/11 era. worse than fort hood, worse than the boston bombing with respect to fatalities. that's why this is very significant. what isis has shown is they can strike here even if they don't have their fingerprints on this crime scene, they can inspire people. that's part of what their plan is. either train people if they can, it's very tough to do that and get people back here, but if you can inspire people to do things, on their own here in the states, that's what they want to do. i testified about this kind of tactic with neo-nazis 20 years ago. it spread throughout the world, prepare for more. >> thanks so much. i know we will talk again.