Mitrokhin files, Part Deux. (Yes, part of it is that oddball). Review here.
Also see graph 3:
"What the book reveals is that the first major Middle Eastern terrorist who came to the world's attention was actually a KGB agent-the Popular Front for the Liberation of Palestine; the head of foreign operations, Wadi Haddad, was actually a KGB agent code-named NATSIONALIST. If you fast-forward to now, spying goes on between the East and the West, but the idea that the KGB or the SVR would use terrorism or terrorists against the United States is unthinkable."
[via Chris Brown]