Spying in the Death Star: The AT&T Whistle-Blower Tells His Story -: "Those documents are under seal, but Wired News independently acquired and published a significant portion of them last year. They show that AT&T built a network-monitoring facility in a nondescript room at an internet switching hub in San Francisco, at 611 Folsom St. Diagrams in the document show that AT&T technicians split fiber-optic cables handling AT&T's WorldNet internet service -- as well as traffic to and from other major ISPs -- diverting copies of the traffic into the room, which was packed with internet-monitoring equipment.
In this rare interview, Klein supplies details of how he first learned about the secret room even before being transferred to the Folsom Street office. He also lashes out at Congress for failing to hold hearings, and says he won't be satisfied until he can visit the AT&T building and see that the room has been dismantled."