In a speech to nuclear scientists Ajatollah Ali Kahamenei today reconfirmed his Fatwa against nuclear weapons:
On numerous occasions, the Iranian people and government officials have announced that they do not seek to develop nuclear weapons and that nuclear weapons have no place among the needs of the nation and the military system of the country. We believe that using nuclear weapons is haraam and prohibited and that it is everybody’s duty to make efforts to protect humanity against this great disaster. We believe that besides nuclear weapons, other types of weapons of mass destruction such as chemical and biological weapons also pose a serious threat to humanity. The Iranian nation which is itself a victim of chemical weapons feels more than any other nation the danger that is caused by the production and stockpiling of such weapons and is prepared to make use of all its facilities to counter such threats.
Reading the whole speech and understanding the logic of Kahmenei’s judgement may be worth your time.