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

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

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