If Iran doesn't develop a nuclear weapon nothing will happen to them. If Iran doesn't block the strait of Hormuz nothing will happen to them. Iran always said and it's a "fatwa" , it doesn't want nuclear weapon. What for ? A few bombs against hundreds in Israel and thousands in the US. Plus second strike capability ! They will block the strait only if there is a total embargo on their oil. That won't be accepted by Russia nor China. So relax, nothing will happen ......except may be a totally foolish strike from Israel.
U.S. sanctions Russia's state-owned arms exporter Rosoboronexport (Reuters)