NSA, Mark Klein and mass surveillance

RIP Mark Klein. He exposed NSA's secret surveillance program in notorious Room 641A
The Electronic Frontier Foundation (EFF) recently announced the passing of Mark Klein, the AT&T whistleblower who exposed the NSA's mass surveillance program nearly two decades ago. Klein worked as a telecommunications technician at AT&T for 22 years when he discovered something alarming at the company's San Francisco facility: evidence of widespread government spying on American citizens.
Mark Klein, AT&T Whistleblower Who Exposed NSA’s Mass Surveillance, Dies at 79
Mark Klein, the former AT&T employee who helped expose the fact that the National Security Agency was spying on vast amounts of internet traffic in the U.S. during the mid-2000s, has died, according to the Electronic Frontier Foundation. Klein’s cause of death was not released.
Bay Area phone company technician who spotlighted NSA phone surveillance dies
Mark Klein, a former telecommunications technician for AT&T and a whistleblower, died in Oakland last Saturday at age 79 due to pancreatic cancer. Klein presented evidence from his work alleging that the National Security Agency was spying within the United States out of a secret room in the AT&T office on Folsom Street in San Francisco.
Mark Klein, AT&T technician who helped expose NSA spying, dies at 79
In 2006, he shared corporate documents showing how the National Security Agency was accessing internet data through a secret room in an AT&T office building.
PBS2d
Whistleblower Mark Klein, who brought NSA’s mass surveillance of Americans to light, dies at 79
I was so proud of him.” Klein was a technician at AT&T in San Francisco when he discovered that the NSA was using a splitter to intercept, monitor and copy all internet traffic and other data ...
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