On an average day AT&T carries some 300 million voice calls as well as over 4,000 terabytes of data -- approximately 200 times the amount of data contained in all the books in the Library of Congress. It is, hands down, the largest telecommunications provider in the United States and one of the largest in the world. So to hear that the company has for years diverted a large portion of the communications entrusted to it to the National Security Agency for it to datamine to its heart's content is discomfiting to say the least.