Jeff, while I believe this falls under acceptable "fair use", shouldn't we at least try to credit the source?
The critical thing that I am trying to get across is the analysis. The pictures support that analysis for sure, and if I knew who for sure the actual source was, I would happily credit them.
In the mean time, as you state, and as I agree, I believe it is acdeptable fair use of what to me is mostly an unknown source as regards the pics.