I think the start is accepting a small amount of risk and not creating hysterical responses like the TSA makes... Intelligence work and targeted screening of high-risk passengers.

No - the big magnet is far, far too dangerous (for instance most pacemakers are not MRI-compatible.) People with shrapnel or veterans could have serious problems from the scanning machine -- it could heat up metal fragments in tissue for example. It could kill grandma, while molesting her and making her remove her adult diapers merely removes her dignity.

Many people say this, but although misguided, terrorists aren't idiots... they could do basic navigation and fly a 767 into a target... surely a basic surgery is not beyond capability. Body scans won't detect the risk, so I'm not sure why they were even deployed, wasting millions that could have gone toward intelligence work or something actually useful.

+1