Why tell everyone about it? Convenient.
Dr. Strangelove:
Of course, the whole point of a Doomsday Machine is lost, if you *keep* it a *secret*! Why didn’t you tell the world, EH?
But will it pop balloons?
Probably because it’s not real.
“Why tell everyone about it? Convenient.”
Well, if it doesn’t work then what’s the harm? Russia and China will be allowed to steal the tech and then spend themselves into oblivion trying to make it work.
And if it works then they’ll spend themselves into oblivion trying to counter it.
Either way we win.