Silly article, the revelations of Edward Snowden shouldn't really tell anyone much about the capability of spies, nothing we didn't already know. If you're interested in a good book about the technical history of the CIA check out 'The Wizards of Langley'. It gives a pretty accurate history of the technical ability of spies throughout the years, and the bureaucracy which limited them. https://www.amazon.com/Wizards-Langley-Directorate-Science-T...