[ctrl_freak]

As the report notes, though, they already have exit information from passenger manifests, and land border entry sharing from Canada and Mexico. I would have assumed this information would have already been sufficiently accurate.

[emilyfm]

Although Canada now reports land (and ferry) arrivals to the US, Mexico does not (yet).

There is no US record of who leaves southbound into Mexico, and in most cases Mexico doesn't have a record of their entry either (requiring a Mexico tourist permit isn't enforced at most entry points).

[ctrl_freak]

Fair enough. But it sounds like this technology is being developed for airports, not land crossings or ferries. How would you setup this facial scanning when people leave the country in a vehicle?