We have this "sacred" revulsion to profiling airline passengers before boarding. Not "racial" profiling--not all "Asians" nor "Africans" nor "Middle-Eastern-appearing" passengers, but depending on immediately prior flights, point of origin, layovers, etc.
The point is that full-body scans, said to be too expensive, full-body searches, said to be too intrusive, etc., need not be done to all passengers--so as to appear "even-handed"-- but confined to people whose body language, demeanor, behavior, etc. arouses the suspicions of trained security observers.
Say, for example, a person flies from Germany to France with a U.S. destination. The person originated his flights in Pakistan. A full-body scan might not be out of order.
A gang of Arabs males heading to Florida, their flight plan originating in Yemen might (should) arouse more suspicions than the elderly American couple who might have been the model for a Norman Rockwell illustration from the old Saturday Evening Post.
The American Norman Rockwell couple do not merit the same scrutiny as the group from the Arabian peninsula boarding a plane in London having flown there from Hamburg, Germany.
By now, you should get the idea. Nothing "racial," only prudent.
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