There is your assumption within that question. Look at what both the Russians and the Americans immediately got rid of as relationships got better in 1988. The classification that the Russians first got rid of were their oldest nuclear strategic weapons, of course, but the next category was their tactical weapons.
The Americans in terms of START I, START II, and START III that Alex already alluded to was, of course, focused on the older weapon systems, but also on the tactical weapons. I think people understand that those are the slippery slopes that are so dangerous.