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

European Union spokesperson said virtual border guard will scan passengers' faces and analyze their micro-expressions. They will use these expressions to find out if passenger might be lying. human security guard will take over if lie-detecting software detects security risk. procedure will initially divide passengers into two types. Low-risk travellers will be asked basic information in lie-detection process, while higher-risk passengers will get more detailed questions. A psychology expert doubted if 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 known problem in psychology."

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