D
RIP Mark Klein.
In 2006 the AT&T whistleblower exposed a secret room inside the company that routed network traffic to the NSA, leaking documents that showed how the agency’s mass surveillance was carried out.
His work led directly to two lawsuits against NSA spying, bolstered by later leaks from Edward Snowden. The government responded with retroactive immunity for AT&T, and the NSA successfully argued that plaintiffs couldn’t sue because any evidence they’d been spied on was itself secret.
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