or just let them run out, TBH the US has such advanced weapons nukes are not necaccary anymore. at one point the US likes saddam, sold him some shiny new WMDs to defend his country from attack (moreover the ameicans oil supply) Ill give you that, its an extreeme comment but it just illustrates the reality pof the situation. Alot of countries are devolping WMDs so thay have sometghing to trhow back at the US if neccacary, think about it. You are a poor underdevoped non democratic nation and america doesnt like you. America had all the most advanced weponry and a huge army, you have nothing close. In fear you want something HUGE just to give you a remote chance of being left alone, what do you do? Make a nuke so if america throws onw your way you can send one back. Iran were quoted to say "if we are interfeared with we will steap up our nucular program" traslated "leave us the !@#$%^&* alone to get on with our own lives" Prehaps a bit OTT but it does seem that internation relations with the US can govern what you can and cat do in terms of weaponry.