Mark Klein is a former AT&T technician who leaked knowledge of his company's alleged cooperation with the United States National Security Agency in installing network monitoring hardware to spy on American citizens. The subsequent media coverage became a major story in May 2006. Wikipedia
Though the government and AT&T refuse to address the issue directly, Klein backs up his charges with internal company documents and personal photos. www.pbs.org/now/shows/307/index.html
The definitive Wikipedia entry for Mark Klein. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Mark_Klein
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