EFF has obtained whistleblower evidence [PDF] from former AT&T technician Mark Klein showing that AT&T is cooperating with the illegal surveillance. The undisputed documents show that AT&T installed a fiberoptic splitter at its facility at 611 Folsom Street in San Francisco that makes copies of all emails, web browsing, and other Internet traffic to and from AT&T customers, and provides those copies to the NSA. This copying includes both domestic and international Internet activities of AT&T customers. As one expert observed, “this isn’t a wiretap, it’s a country-tap.“