Earlier quoted context omitted.
There's no federal law requiring AT&T to hold onto this data. There's possibly a FISA court requirement (too secret to reveal), but AT&T has long been an exceedingly willing part of the gov's spying apparatus. It fed these records and Internet data to the feds without any court order, and only escaped legal troubles when Obama, contrary to his campaign promises, gave AT&T, Verizon and more retroactive immunity
They added windows to this now, but I always wondered what this windowless skyscraper was, back in the day, in Downtown NYC. https://nymag.com/intelligencer/2016/11/new-yorks-nsa-listen...
I believe there was another similar nexus downtown near the World Trade Center, which was destroyed on 9/11. For at least a couple of weeks we had very limited communications and credit cards were hard to use as a result.