Why were US airlines able to stop checking IDs at the gate less than a year after 9/11, while European and Asian airlines still to this day check identity documents. Has this resulted in a lower level of flight security in the US? Do US airlines know something the Europeans don't, or do they just have more lobbying power with their government. This blog post analyzes the economic reasons behind the US airlines decision to stop checking IDs, and exposes the fact that US Passenger Name Record (PNR) data is for the most part, unreliable and worthless.
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