This week's document is one that most nuclear wonks have seen before: the Summary Report of the Nth Country Experiment, produced by the Lawrence Livermore laboratory in 1967. It made a big splash when it was declassified in 2003, for good reason. Here was an official government study, from over 30 years ago, which said that there were essentially no secrets left when it came to designing nuclear weapons.1
The report summarizes the results of a 1964 "experiment," in which Livermore hired two physics postdocs and had them try to come up with "a credible weapon design" based only on information in the public domain and computer support. A third postdoc was added a year later. The experiment ended in April 1967.
From a modern perspective, this is fascinating stuff. If three postdocs can design a nuclear weapon, then what's to stop a terrorist? What's the value of secrecy? Isn't it amazing they were worried about this stuff almost 50 years ago?
But I think there are some more things to say about this.