metal detector. and -- and it's widely understood, you're doing that, you know, to protect all of us, right? to keep bad guys off the plane with guns or bombs. why can't you make a similar argument for -- for vaccines, in this case? >> well, i think you can make that argument. but i think it's incumbent upon us to look at the downsides of these things. i think, too often, during this public-health crisis, and it is a crisis, and talk to people you trust if you haven't got a vaccine, yet. and -- and hash through that with them. i am -- i am convinced that the persuasion part of it actually shouldn't be over. um, and that the punitive part, perhaps, has come on very heavy handed in the last couple of weeks and i'm not sure how effective that's going to be. but there's, too often, during this, we have jumped to sort of maximal curtailing of liberties in hopes that it would have really good outcomes. in my area, they haven't had school, in person, or didn't, for about 12 months. and then, minimally, at best. and it turned out that, that had had a lot of really bad effects