Even in an age in which computerized feats are commonplace, the N.S.A.’s capabilities are breathtaking. The agency reportedly has the capacity to intercept and download, every six hours, electronic communications equivalent to the contents of the Library of Congress. Three times the size of the C.I.A., and with a third of the U.S.’s entire intelligence budget, the N.S.A. has a five-thousand-acre campus at Fort Meade protected by iris scanners and facial-recognition devices. The electric bill there is said to surpass seventy million dollars a year.
sursa Jane Mayer - The Secret Sharer