scanned. but the question is we're spending billions of dollars on technologies that haven't proven to be effective. now, i'm not talking about scanners. i'm talking about these data mining issues. >> let's stick with scanners for a minute. there have been remarkably few airplanes blown up and remarkably few people seizing airplanes since -- i don't like the -- i travel all the time. i don't like the system, but i've concluded that it is a necessary evil in a world where people would really do us harm. >> but they're also -- there has been a limitation on the use of sharp weapons. there's been strengthening of cockpit doors. so just because you have an elephant gun doesn't mean you shot all the elephants in your m midst. just because you have scanners doesn't mean you stopped all the airplane terrorist attacks. >> don't you have to do everything you possibly can to do that? >> within reason. >> the underwear bomber, the shoe bomber. >> our unifying principle is the