And the other Telcos?
Read James Bamford's book, The Shadow Factory, which explains that all the Telcos were "encouraged" to help Big Brother.
It has long been known that AT&T works with the NSA to monitor the internet traffic and call data in the US and overseas. Now, new files leaked by whistleblower Edward Snowden show the company is by far the agency's biggest spying partner. The document trove, published by ProPublica and The New York Times, doesn't mention AT&T …
Well doubtless they're all "encouraged" but
Memos describe the telco [AT&T] as showing "extreme willingness to help with the NSA's SIGINT and Cyber missions," and call the relationship "unique."
God knows what must comprise AT&T's "unique" "extreme willingness" --->
@AC
I seem to recall AT&T wrote a special language a subset of C that was designed specifically to sift through call data, open source, but that is showing a willingness to go the extra mile, so god knows what else they have done.
This could be it but running out of edit time to confirm
http://www.cs.berkeley.edu/~bonachea/hancock/hancock.pdf
Why? Because the current "Death Star" motif doesn't get the idea across?