you are doing a big mistake about Iran. The more pressure you inforce on them, the stronger they become. Learn from the history. The Iranians always adopt and become stronger. The policy of carrot and stick might work on other nations but not Iran. You will understand what the above means once you learn their pride is the most important in their lives. The policy of engagement works with them not isolation.
Wes Craven, director of 'Scream' and 'Nightmare on Elm Street', dies 76 (Haaretz)
from the article: Iran official: Russia obligated to complete S-300 sale