afghanistan, avoiding a war with iran, and de-escalating a trade war with china. >> there's also real threats and challenges that don't just come in the form of hijacked planes. nick, you know better than i do, you've got cybersecurity, you've got disinformation campaigns. we have seen these issues realtime over the last couple of years. so, for those who argue, we are safe, we haven't seen a 9/11 in 18 years, what do you say to them? >> well, i say a couple of things, stephanie. first of all, our defenses are much stronger than they were at the time of 9/11. we are much more capable of defending ourselves, going on the offense, when necessary, but also the array of defensive measures we've erected in the homeland security enterprise since 9/11. but at the same time, as ben points out, and as your question points out, that threat landscape that we face is a whole lot more complicated than it was at the time of 9/11. we're not just talking about a small handful of al qaeda operatives trying to penetrate the united states. we're talking about a sunni