mgb_phys
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The important point is not to base your security on what happened last timearildno said:It is just silly to lump together the dangers posed by crew members and the dangers posed by passengers, for effective measures, they constitute totally independent groups, each requiting their own set of effective security measures.
That was the whole problem.
Hijackers in the past didn't hurt anybody, they were either paid or flew to Cuba.
So policy was don't resist. That allowed a bunch of hijackers to fly planes into buildings.
So deciding that hijackers are all middle eastern men, and only security checking them is going to have the same effect. They are going to get a white looking guy to smuggle the next bomb.
Then you add the specific details of that guy to the list ... and so on.
Do you think El-Al security look down the line of passengers and don't bother to search anybody with a yamulke ?