As for the passenger behavioural analyses or programs you have, I see that as almost as important, if not more important, than the body scanners. I never have any problems at the airport; I fly often enough that I know what I need to take off my person so that I can walk through the traditional scanners without a problem.
So really, the issue for me is the passengers themselves. Have there been any studies done or any information gleaned on how we can better identify those who may be a threat?