The Single Best Overview of What the Surveillance State Does With Our Private Data Link: The U.S. surveillance debate is constantly distorted by the fact that national-security officials hide, obscure, and distort so much of what they do. Occasionally a journalist is able to expand the store of publicly available information, most recently thanks to Edward Snowden’s indispensable NSA leaks. But even public information about government surveillance and data retention is difficult to convey to a mass audience. It involves multiple federal agencies with overlapping roles.