I wrote this a while back, too.
I’m finally getting around to posting a tidbit I found a while back in Tyler Drumheller’s On the Brink: An Insider’s Account of How the White House Compromised American Intelligence.
I am referring to the assertion that, when Drumheller was a CIA operative in South Africa, his sources
provided incontrovertible evidence that the apartheid government had in fact tested a nuclear bomb in the south Atlantic in 1979, and that they had developed a delivery system with assistance from the Israelis.
I really wish Drumheller had provided more detail about this evidence, which sounds a lot more concrete than the Vela satellite evidence. Obviously, a debate still rages about South Africa’s alleged test and cooperation with the Israelis, so more information would be welcome.