Sean's Russia Blog “revisits” Aleksandr Litvinenko's poisoning case and, among other things, recommends reading a piece the New York Sun by Edward Jay Epstein: “The article’s value is in his questioning of the accepted and unchallenged assumptions about the British investigation, the chain of events, Litvinenko’s movement around London, the role of Berezovsky, and why no one seems to be concerned about finding out where exactly the polonium came from, especially given the global concern for possible nuclear terrorism.” (Epstein's blog is here.)