The only problem I have with them is they are incredibly expensive, possibly dangerous, and completely ineffective at stopping anyone other than the most idiotic terrorists out there. There have been exactly 18 plane hijackings per year since 1988, with exactly three of those originating in the United States. Of those three, none of these scanners would have caught the hijackers since they entered the system at regional airports that even today do not have these scanners in place.
The lesson of this? If you spend millions on a security system that can't be moved and can't be easily changed to meet new threats and then make sure everyone in the world can see if and knows who makes them ... well don't be surprised if its compromised even before its fully up and running.
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