Klein, a former AT&T technician turned whistleblower, exposed mass surveillance by the U.S. government in 2006.

In 2006 the AT&T whistleblower exposed a secret room inside the company that routed network traffic to the NSA, leaking ...

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 ...

The US whistleblower Mark Klein is dead. He made it public for the first time that the NSA was also eavesdropping on US ...

Mere days ago, a man by the name of Mark Klein passed away – he was a telecommunications technician for AT&T for 22 years and ...

The unlikely hero who stood up to the government Mark Klein, the AT&T technician who blew the whistle on one of the most ...

The Electronic Frontier Foundation (EFF) recently announced the passing of Mark Klein, the AT&T whistleblower who exposed the ...

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.

The Rocky Mountain ATV/MC WORCS Series event headed to Lake Havasu City, Arizona, March 7-9, drawing top riders and ...

Mark Klein, a former telecommunications technician for AT&T and a whistleblower, died in Oakland on Saturday at age 79 due to pancreatic cancer. Klein presented evidence from his work alleging that ...