[sorbus]

Or they could send someone through multiple times, giving them a prepared briefcase each time, but only put a bomb in it the last time, but telling them that there was a bomb each time; eventually, even an idiot will get used to it, and stop triggering their screening. Hell, depending on what sort of records they keep, they might eventually interpret his nervousness to just be who he is (dislikes flying, say), and wave him through anyways.

[ghshephard]

If my (discredited by most on HN, but I still hold to it) theory regarding El Al security screening is correct, they aren't principally looking for people who are nervous, or acting guilty (though they'll pull those people aside as well) - rather they are trying to identify individuals that fall within the category of people that might bomb El Al, and then pull them aside for selective screening.

Your average Muslim individual would have little chance convincing a screener they were an observant Jew, and would always fail regardless of how many times they attempted.

By the time they had learned a patter that would get them through security, they would probably be bright enough to say "Hey, why am I wasting my life by blowing myself up? I should probably _run_ operations instead of being in them"

The supposed success of El Al isn't (in my opinion) that they can stop a broad community of attackers, rather it is that they are effective in profiling quickly, and passing through 95% of the passengers quickly, and only subjecting 5% to selective screening.

I'd be interesting in hearing of the experiences of any Palestinian or Muslim passengers that have flyed on El Al for anecdotal confirmation of this.