RIP Mark Klein, the engineer who exposed US domestic spying
Briefly

Mark Klein, a retired AT&T engineer who passed away in 2023, disclosed significant government surveillance activities in the U.S. He exposed the NSA’s wiretapping operations, particularly in Room 641A at AT&T’s San Francisco facility. Klein faced considerable dangers, including death threats and legal repercussions, to bring public attention to the illicit spying on American citizens post-9/11. His actions led to important lawsuits and discussions regarding privacy and government overreach, highlighting a crucial moment in the ongoing debate about surveillance rights and citizen privacy.
Klein realized he had helped the NSA wire up a listening station in AT&T's San Francisco switching facility - the infamous Room 641A - that was being used to illegally spy on Americans.
The evidence he gathered and shared led to two lawsuits that exposed the extent to which US citizens were being spied on by their own government in the post-9/11 world.
The idea of wiretapping our own people really bothered him, and he found himself working for a company that's intercepting emails and conversations.
Klein faced legal pressure, death threats, and the constant fear of ruin, to get his story out and tell the public what was going on.
Read at Theregister
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