Trailrunner7 writes The United States federal government issued more than 19,000 National Security Letters – perhaps its most powerful tool for domestic intelligence collection – in 2013, and those NSLs contained more than 38,000 individual requests for information. The new data was released by the Office of the Director of National Intelligence on Friday as part of its effort to comply with a directive from President Obama to declassify and release as much information as possible about a variety of tools that the government uses to collect intelligence. The directive came in the immediate aftermath of the first revelations by former NSA contractor Edward Snowden about the agency's capabilities, methods and use of legal authorities.
The use of NSLs is far from new, dating back several decades. But their use was expanded greatly after 9/11 and NSLs are different from other tools in a number of ways, perhaps most importantly in the fact that recipients typically are prohibited from even disclosing the fact that they received an NSL. Successfully fighting an NSL is a rare thing, and privacy advocates have been after the government for years to release data on their use of the letters and the number of NSLs issued. Now, the ODNI is putting some of that information into the public record."