There is no doubt in my mind that the answer is YES. Why else do you think they are so arrogant and cocky? They have the nukes to back it up....
According to Iranian government documents in Israel's possession, Iran received several nuclear warheads from a former Soviet republic during the early 1990s, THE JERUSALEM POST reported.
The documents have been deemed authentic by United States congressional experts and are still being studied in Israel. They contain correspondence between Iranian government officials and leaders of Iran's Revolutionary Guards that discusses Iran's successful efforts to obtain nuclear warheads from former Soviet republics. The documents appear to bolster reports from 1992 that Iran received enriched uranium and up to four nuclear warheads from Kazakhstan, with help from the Russian underworld.
"Iran does have nuclear weapons", General Yuri Baluyevsky, the Russian Deputy Chief of Staff told journalists, adding: "Of course, these are non-strategic nuclear weapons. I mean these are not ICBMs with a range of more than 5,500 kilometers and more. But as a military man, I see no danger of aggression against Russia by Iran."