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Airports will soon add a new layer to their security procedures. Several airports Europe will start giving lie detector tests to passengers. Special lie detector machines will use artificial intelligence to test travellers. The lie detector machines are backed a European Union project called i-BorderControl. The first machines will be border checkpoints Hungary, Greece and Latvia. Airports these countries will carry trials on the lie detector machines this month. Travellers outside the European Union will have to take the test. They will look a webcam and answer questions a computer-animated immigration official. The computer-generated animation will change to match the race and language the traveller.

A European Union spokesperson said the virtual border guard will scan passengers' faces and analyze their micro-expressions. They will use these expressions to find if the passenger might be lying. A human security guard will take if the lie-detecting software detects a security risk. The procedure will initially divide passengers two types. Low-risk travellers will be asked basic information the lie-detection process, while higher-risk passengers will get more detailed questions. A psychology expert doubted if the system would work. He said: "If you ask people to lie, they will do it differently and show very different behavioral cues than if they truly lie....This is a known problem psychology."

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