Kiosks and online check-in have relieved much of the line agony passengers once experienced at airports. But these technologies were installed as other queues were growing, for baggage, security and border control. Overall, today’s passengers may not feel their airport journey has been eased. Could another technology, biometrics, help? Governments, airlines, airports and their technology partners have begun experimenting. Better, faster and more accurate biometric tools are coming ...

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