While walking around certain parts of the airportterminal, a passenger may not realize he has stepped on a "smart carpet" filled with hidden biometric sensors.
Planning officials blocked expansion of a passengerterminal at Coventry airport, for example, because the government had said it played only a niche role for freight airlines.
LONDON, England (CNN) -- A system using fingerprint scanning and face recognition systems, designed to speed up passenger transit times and increase security, is beginning a trial at Heathrow airport's Terminal 3.