Steven Hadley of the NSC reportedly said today that this proves that our sanctions have been effective............ The US sanctions have been so effective that not only they stopped the Iranian program. They actually made the program work backwards all the way to 2003 ...... years before the sanctions were imposed. These sanctions are obviously very effective tools of the NSC and should be studied by all interested in national security, foreign affairs and international diplomacy.
EU's Mogherini in Tehran to talk nuclear deal, regional issues (Reuters)
from the article: U.S.: Iran halted nuclear weapons development in 2003