why would it matter so much if they were trying to make weapons? is it because their leaders are crazy and might attack another country? because the US arguably has fucked up leaders, who, i'm sure, have a greater track record of attacking other countries than the iranian government does lately. also the US has been doing a lot of policing right around iran (afghanistan, iraq), so if iran does end up getting nuclear weapons, i think it will be directly because of US foreign policy.