A few people still seem to doubt that Iran is working on nuclear weapons.
Satellites are launched with liquid-fuel rockets (Saturn, Atlas, Ariane, Energia, and so on). Nukes are launched with military rockets, which are solid fueled whenever possible (Minuteman, Peacekeeper, SS-20, Scud, even the Qassam).
The exceptions are few: There are just a few liquid fuel weapons rockets, including the German V1 and V2 of 60 years ago. And the space shuttle launches with a hybrid.
Iran has a vibrant and robust program of long-range surface-to-surface solid fuel rockets. They are only useful for launching nuclear weapons. See this Strategy Page article.





