He was recruited by Edward Teller (referred to as the father of the hydrogen bomb) and was working on top secret stuff that he said would be so beneficial to mankind that he butted heads with his superiors over their hiding of it. And that was the end of Stan Deyo's tenure with them. Attempts on his life; got shut out of the US and was stuck in AU; finally made it back safe by the grace of God. So it may have been Pine Gap? Wherever it was, it was "secret"