Mark Klein

Mark Klein
Mark Klein is a former AT&T technician who blew the whistle in 2006 on AT&T's cooperation with the United States National Security Agency's domestic espionage programs, after he discovered Room 614A, a secure site where American's internet traffic was forwarded to the N.S.A. for processing. His revelations resulted in multiple lawsuits filed against the federal government and AT&T for their participation in mass espionage. He retired from AT&T in 2004.