I was wondering why this felt like old news...
From "Telecom Informer" in 2600 magazine, summer 2006, page 13:
"Unfortunately, what they're doing with the information is all a secret and I don't have the security clearance to go into the special room the NSA has set up here. All I know is that they've spliced into every fiber connection in the place and they have their own secure trunk out of here to Fort Meade, so you can probably draw your own conclusions."