Passenger gates with biometric fingerprint scanners have been deployed at Istanbul's main international airport.The "Biometric Passport Automatic Rader Systema" is expected to reduce the passenger throughput time to just 15 seconds.While four booths were installed at the Atatürk Airports international flights terminal this week as part of a trial period, the number will rise to 24 by the end of 2015.Facial recognition is also scheduled to be added to the system by next year.The eGates feature a man-trap to prevent suspects on watchlists from passing through security.Last August, the airport added two automated kiosks enabling Turkish citizens to scan their biometric passports.The airport is viewed by Western intelligence organisations as a key destination point for foreign fighters travelling from Europe to join Syria's civil conflict.