I think it's a big waste of time and money, which could be better spent on the economy (and Climatology). Only the countries with none or few, will be all for it, just to imply that they got them, and are powerful. Countries like the U.S., Russia, China, have already reduce as far as they intend to go, and feel safe about having them sitting around. I really don't see anybody actually using them, nor are they going to say how many they actually have, or willing to get rid of. Just a big expensive party, where everyone hopes to get some idea what the other guys have hidden, to lie, to boast. Regardless if they sign a treaty or not, they all will keep the weapons the feel they need, maybe retire a few older ones of questionable safety.