Notes
The author wishes to thank Toby Dalton, Jim Doyle, Jason Ellis, John Lepingwell, Ken Luongo, David Mosher, Frank von Hippel, and the editors of The Nonproliferation Review for providing comments on early drafts of this article. He especially wishes to thank Matthew Bunn for his substantive and organizational comments on several versions of this article, and Teri Grimwood for her efforts to improve the clarity of the final text. Any remaining errors are, of course, solely the responsibility of the author.