Your description of this thing is disappointing. There seems to be little hope that it can destroy the world, and so we are going to have to come up with another way to do that. Why did they make the thing so little, and not go for something that would be dangerous for the planet? Are countries too cheap to do that, because they have less expensive ways to destroy the planet?
"A wise man ... proportions his belief to the evidence."
— David Hume, An Enquiry Concerning Human Understanding, Section X, Part I.