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Susan Karlin Liar Detector (Price: $200,000) An airport security guard's greatest fear is letting through terrorists smart enough to stay off the watch list. Suspect Detection Systems came up with a machine to smoke them out. A passenger puts his passport on a scanner and one hand on a sensor. The machine starts asking increasingly tough questions in the official language of the passport-issuing country. Artificial intelligence software monitors physiological responses through the sensor. Agents pull aside those who fail the test. The company claims a 96% accuracy rate after two years of testing. Slated to go into use next year in Israeli and U.S. airports, as well as Gaza Strip checkpoints.
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