The quiet AT&T technician who exposed the NSA’s secret internet tap has died

Mark Klein, the AT&T technician who exposed NSA’s mass surveillance of US residents, has passed away. He discovered the NSA had installed secret rooms in AT&T facilities, specifically Room 641A in San Francisco. These rooms contained splitters that copied all internet traffic passing through the facility, effectively creating a massive domestic surveillance operation. The whistleblowing came at considerable personal risk, with Klein facing potential civil and criminal prosecution. His evidence provided a detailed blueprint of how digital surveillance actually works. Many of the systems Klein exposed remain operational, albeit under different legal frameworks.

via EFF