You are correct they [Abu Ghraib photos] happened in November. One question that has plagued me about those pictures - were the people involved in either the filming or the soldiers themselves working for Moore?
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It is a given that the anti-war, human shield, Code Pink, ANSWER-type folks did not just fade into the sunset with the fall of Saddam. It really is entirely possible that they had found and exploited the military weaknesses of those involved with cell Block 1A. The rabid Anti-Bush leders surely would have been in routine touch with Michael Moore.
One more 'coincidence' that has not been mentioned on this thread, at least as far as I have read, is that there is a left-wing bring-radio-communication-to-the-third-world company that is also named Prometheus something, I bet Michael Moore and Michael Berg both know about this organization, and that Nick Berg happened to decide to have a career in climbing radio towers as a result of his father's interest in this company.
Prometheus Radio Project is a non-profit, I believe, that receives funds from big foundations to bring "guerrilla radio" to the Third World. Complicating the issue of finding out about it is the fact that its members use pseudonyms.
However, it has a board, and on another thread, someone had identified a "Carol Berg" as being on the board, and said that Carol was the middle name of Nick Berg's mother.