“Furnished” in a broad definition. Akin to “here’s all the parts to a gun, go assemble it yourself.”
There will be no cites available for “open secrets” that everyone agrees is true but nobody can prove.
It is, I guess, as unproveable as ‘everyone agrees.’
But since, it is alleged, that Israel stole enriched uranium from the US Navy, it doesn’t sound like the US was supplying them.