And The Intercept news site has begun releasing a trove of internal newsletters from what it says is the most significant division of the National Security Agency. The documents from the Signals Intelligence Directorate date back to 2003. In addition to more mundane details about employees’ vacations, The Intercept says the internal newsletters, which were leaked by Edward Snowden, reveal details about how the NSA helped pave the way for the Iraq War, and how its personnel worked alongside the CIA and other agencies on interrogations at Guantánamo.