I read through all the comments here before beginning to read the article. The comments that say that the usability of the article format is very bad are correct. The online format is too cute by half, and impairs readability. But the article is well worth reading. As Danso points out, the journalist who did the reporting on this article is a renowned independent investigative reporter, James Bamford, who has broken many important stories about NSA in previous years. The writing is worth reading and discussing here, and it's too bad Wired's editors mucked up the reader experience so much with the strange user interface and formatting.
"I confess to feeling some kinship with Snowden. Like him, I was assigned to a National Security Agency unit in Hawaii—in my case, as part of three years of active duty in the Navy during the Vietnam War. Then, as a reservist in law school, I blew the whistle on the NSA when I stumbled across a program that involved illegally eavesdropping on US citizens. I testified about the program in a closed hearing before the Church Committee, the congressional investigation that led to sweeping reforms of US intelligence abuses in the 1970s. Finally, after graduation, I decided to write the first book about the NSA. At several points I was threatened with prosecution under the Espionage Act, the same 1917 law under which Snowden is charged (in my case those threats had no basis and were never carried out). Since then I have written two more books about the NSA, as well as numerous magazine articles (including two previous cover stories about the NSA for WIRED), book reviews, op-eds, and documentaries."
As a substantive comment on the article, let me say that I find it interesting that Snowden himself thinks it is appalling that NSA's internal security auditing is so poor that NSA can't even tell which documents Snowden disclosed to journalists, nor can it tell how many other leakers may still be on its staff. This seems to be a completely plausible claim, and that would be a reason why many American voters or leaders of countries allied to the United States might desire the current leadership of NSA to resign and be replaced with more competent leaders.