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Mark Klein is a former AT&T technician and whistleblower who revealed details of the company's cooperation with the United States National Security Agency in installing network hardware at a site known as Room 641A to monitor, capture and process American telecommunications.
Jun 27, 2013 · Mark Klein, a retired AT&T communications technician, revealed in 2006 that his job duties included connecting internet circuits to a splitting cabinet that led to a secret room in AT&T's...
May 10, 2007 · Mark Klein, a retired AT&T technician, sits quietly at the center of a high-profile legal storm hitting the nation's largest telecommunications companies for allegedly helping the...
Aug 18, 2015 · Mark Klein, a former AT&T technician, reveals how the company cooperated with the NSA to spy on the Internet. He leaked internal documents that confirmed his claims and faced legal battles with the government.
May 17, 2006 · Former AT&T technician Mark Klein is the key witness in the Electronic Frontier Foundation's class-action lawsuit against the company, which alleges that AT&T illegally cooperated in an...
Nov 5, 2018 · Mark Klein exposed the illegal collaboration between AT&T and NSA to monitor and collect data of American civilians without warrants. Learn about his career, claims, confirmation, and the aftermath of his whistleblowing in this article.
Klein is a witness in a lawsuit filed against AT&T by the Electronic Frontier Foundation (EFF), which alleges AT&T illegally gave the NSA access to its networks.
