In the not too distant future, you could walk into the international terminal of almost any US airport and board a plane without showing anyone your passport.

At the check-in counter, you'd pose in front of a camera that scans your face and sends your image to a remote system that matches it to a stored copy of your passport photo. You'd have your photo taken again at the security line, and again at the gate. If everything still matched up, you'd be on board, quietly warring with your seat mate over the armrest.

Read more at Cnet.