London: Secret lie detectors, which can pick up tell-tale signs of people giving false accounts of themselves, are to be installed “covertly” at a British airport. High definition video and thermal imaging cameras could be used at passport control or in customs interviews to detect those trying to trick immigration officials.Scientists hope the technology will enable officials to be able to detect liars “with the click of a button” – but critics fear the devices could violate privacy if they become more widespread. The system was designed by Hassan Ugail, professor of visual computing at the University of Bradford. Read Full: Face-reading lie detectors to catch fugitives at airports - Indian Express