That's why we would like there to be behavioural and other kinds of analysis done, because it can sometimes be as effective, and occasionally more effective, than the technology. That kind of analysis is almost always expensive. Rather than investing in replacing evermore costly technologies over a number of generations, we should be designing another model, which is more balanced and will lower security-related costs. We can deliver a better product without having to make passengers pay more.
On May 6th, 2010. See this statement in context.