Elf do you think that nations like Iran, Syria and North Korea give a crap about any self-imposed ban that the US has on itself about low yield nukes?

Can you imagine 2 mullah's and Kim Jong Ilk sitting around saying, "well we had better quell our attempts to become a nuclear power because the US can't develop/test/use them?"

Come on. This is about proliferation of nuclear weapons. Rogue states don't give a sh|t about what the US, Canada or Merry ol' England do, they act on their own accord with their own interests in mind.