Interesting observations. The Israeli model, of course, would never work here, for innumerable reasons. Ben-Gurion airport processes nine million passengers a year. Baltimore-Washington International alone processes more than 20 million. Put aside considerations about civil liberties; physical space; and hiring (i.e. the tens of thousands of interrogators -- because that's what Israeli airport security agents are -- who would be needed to staff the checkpoints). There's no possible way to process through the system the number of flyers in America.
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