CNN The Situation Room December 31, 2013 23:17:00
Is important. >> reporter: they are being tested at london. they scanned passengers' irises. unmanned exit lanes are also in the works. they use sensors and locks to make sure no one sneaks into a secured area by an exit. and at international arrival terminals, there's the global entry program. for those who seen up, machines scan fingerprints and passports for customs and immigration. >> it takes low risk travelers and gets them through our process that much quicker, which would give me more time with high-risk travelers. >> reporter: it allows them to avoid tedious lines.
Source: archive.org