I have experienced the same at #SFO when boarding to Zurich during my last two visits. No possibility to opt-out.

Worse, when I asked for details about the system or a privacy policy, no one at the airport knew what to refer me to.

At least for full body scanners, the TSA has a process in place that they apply without challenging you, when you ask to opt out.

For facial recognition, nada!

Great reporting by @josephcox@infosec.exchange (You should subscribe to 404's RSS feed too!)

An internal airport email obtained by 404 Media shows CBP is changing how it measures its goals for biometric boarding when people fly out of the U.S.