I don’t mean to be flip, but they didn’t need the archive to figure this out. They could have looked it up on Wikipedia.pic.twitter.com/orvSELpWU4
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(This doesn't mean the diagram doesn't possess any "secrets" — just that it isn't trying to advertise that it contains them.)
And the fun fact as you well know. The combination of certain unclassified items together could in itself be consider classified too...
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