I'll be very quick.
This is a key component, and Mr. Jenkins has mentioned that. It is part of Russia's other side. There is the conventional war going on, but there's the nuclear deterrent aspect and the nuclear threat aspect.
Putting nuclear forces in Belarus is very consistent with the escalatory rhetoric that Russia is now doing. They are actually putting forces into Belarus to back up their rhetoric. There is tactical and then there is strategic nuclear—the thermonuclear stuff—and I'll just leave you with these comments. Medvedev, the chief of the Russian Security Council, has stated very clearly in the last month that Crimea is existential and Russia will use “all...weapons”—that's not just the tactical stuff; that means thermonuclear—to defend Russia. He doesn't want to use this stuff, but he wants to threaten so as to dissuade and deter Ukrainians, with the American pressure on the Ukrainians, from attacking Crimea.