Read that please. We have lots of those valleys. Recall also that we have understood that it is plausible with cloud cosmology, that all planets are really hollow and plausibly populated, including the Earth. This is not plausible using present physics and cosmologies thus all this gets dismissed. Thus contact with Venus and technology sharing is highly plausible. Add in the Manhattan project and we have the military umbrella and practice as well.
It still took direct alien contact of which we have ample evidence and later suppression to support it. That it started with the Germans makes complete sense simply because up to 1930, Germany led the world in science research. Britain lagged and the USA stunk in direct comparison. We all forget all that. They still sequestered Tesla's work of course and did support him in the last decades or so of his life. Thus they had access to free energy but have never released it to public use through a profound misunderstanding of economics.
They most certainly are using it all in the secret programs that now includes a working space fleet of some sort and a Mars presence.
All this curious disclosure is nicely locking up time lines and supporting disclosure of a huge program that has been completely hidden under the rubric of alien activity to whom we have become acclimatized..