And again, to be really, really super explicit about this:

In the initial deployment, collection systems are recording “every single” conversation nationwide, storing billions of them in a 30-day rolling buffer that clears the oldest calls as new ones arrive, according to a classified summary.

Nationwide of a foreign nation.

Not here.

Spies doing spy things.

From a technical perspective, it’s actually pretty impressive. That’s a buttload of data to collect and store.