i'm not sure that was truly a b.d.o., behavior ze tecks, success. also, as i recall from reading his case file, he was an iraqi war veteran suffer from post traumatic stress disorder and wasn't on his medication at the time. >> mr. ron, would you like to dement? i know the israelis were pioneers in this. >> yes. the israeli principle behavior of detection is wider principle identifying revel of -- level of risk of the individual passengers. and it's also based on looking at other sources of information rather than just observation. so you have to look at that time in that context. but i still have to say that the b.d.o. program, despite the fact that it has been noted both by -- there's no scientific support. but i need to say that there hasn't been a serious research into this so that by itself doesn't prove that it doesn't stand. i think those airports here in the u.s. that we have worked with on this issue, mostly with local police officers, there's been a reasonable level of success in detecting people with malicious intentions. >> let me just a