From Scott M. Kozel:
On Monday, December 12, 2016 at 6:31:27 AM UTC-5, Stuf4 wrote:
snip
By simply *testing* a full-up ICBM, you would be starting a war.

How would any other country know that it had a nuclear warhead when it was launched?

I don't know (more on that in my reply just now to David).

The specific case I was referring to was when a country announces that it will be conducting a test of a nuclear warhead.

Announcing that you're launching an ICBM with a nuclear warhead has never been done.

*Loads* more questions hinge on what you are asking.

~ CT