Iran is so close to the bomb, that no sanctions will be able to save us from their temptation to go ahead, come what may. Even if sanctions are truly hurting the regime's bonzos, they will go for it. Too much time was lost. Now the other tools have to be considered. I'd suggest regime change. Whether that is truly possible, is very doubtful. This fanatic dictatoruship has no scruples, and an attack could be catastrophic too. There are only very bad options available. The world has to choose responsibly the least bad among them.
Islamic State destroys part of Syria's Temple of Bel, monitoring group says (Reuters)
from the article: U.S. Congress urges Obama to impose 'crippling sanctions' on Iran