http://www.bbc.com/travel/blog/20130206-new-measures-in-airport-security The TSA’s move is yet another example of how governments across the globe struggle to provide effective security while ensuring passenger privacy and efficient queues. As such, airports in the US are trialling new security measures – including facial recognition and iris scanners – to achieve this difficult balance. Managed inclusion Currently at checkpoints at Indianapolis and Tampa airports in Indiana and Florida respectively, the TSA is testing a system called “managed inclusion”, in which officials inspect the queues, sometimes with explosive-sniffing dogs, and select passengers to move into expedited security lanes. The process – also known as behaviour detection – involves each passenger having a conversation with an officer, who asks questions while looking for signs of fear. Passengers who act suspiciously may be subjected to secondary screening measures, such as more invasive pat downs. A similar experiment ran for 60 days at Boston’s Logan Airport in 2011. There’s no word on whether this system will be deployed at other airports nationwide.