This is already happening. People visiting the US and entering through airports have had their fingerprints and facial biometrics captured since 2004, and it's been progressively expanded since then. All visa applications have the same information captured at interview, too.

The current large expansion planned is capturing facial biometrics at exit, and using this to confirm departure (instead of relying on airline manfiests).

But that's nothing compared to IDing people by their license plates, face, gait, etc. as they pull up to the airport, to catch them earlier.

People need to stop thinking gait is a useful metric. It's been disproved as an effective biometric, and is largely ignored by the (non-fraudulent) biometrics research community and companies offering products based on said research. There are simply too many trivial things that significantly alter an individual's gait to make it a meaningful metric.

Pretty sure PDX captures faces when exiting. They force you through a series of doors/lanes, and if you look up two cameras (at least) per lane facing you. Since they're spaced apart I wonder if they're using it to make a 3d image.

They take iris scans I think - that's why you have to gaze into the scanner. Iris recognition is very accurate (they prefer better than 1 in 1000000 accuracy!), and hard to modify.

I fly into and out of PDX regularly, and there's no scanner that you have to gaze into. Parent is talking about cameras at a high angle in a hallway—no one is there to make you look up. Are you talking about the millimeter-wave scan in security? Your eyes can be closed while doing it—no one complains.

Yeah, you know what I'm talking about. They're fairly new (at least on the D/E side. They're angled in a way where it should be able to get your face as you're walking up unless you stare at the ground, but considering having your face scanned isn't a requirement for flying they're probably fine with that - if they are in fact collecting this data.

Ahhh, not the same as the lanes we have that you need to gaze into an obscured camera to pass inwards international border control (must get green light before gate will let you through).

Global Entry kiosks require you to look directly into a camera a foot from your face. It's not a very good camera, but I wonder if that's what they are thinking of?