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It's possible to do something similar to protect airline safety. It's possible, for example, to take four or five basic pieces of information about somebody (such as name, address, phone number, date of birth) and match them against the commercial databases used by mortgage companies and credit card issuers to arrive at a surprisingly sophisticated terrorist risk profile of each passenger.

This makes too much sense, thus can never happen. Of course, this article can't let go of political correctness. I would include as the most essential item of information: muslim or non-muslim?

It is a perfect solution to deal with aliases, too. If your name is not in the database, you get a mug-shot and fingerprinted, and you don't fly that day. If you are an alien and throw a hissy fit, you are expelled immediately with prejudice, no matter how big your bank account or how important you think you are.

Too simple?

For whatever it's worth, I think the cost of "accomodating" our clear enemies in the United States alone is closer to $trillion annualy. Of course, no such analysis can be permitted by the clueless. When it becomes unavoidable to see, the draconian measures will necessarily be worse. Much worse.