Russia announced Monday, to unfreeze its sale of the advanced S-300 air defense system to Iran.
“Amid American pressure and Israeli persuasion, and mainly because of its own interests, Russia decided several years ago to suspend its decision to sell the weapons system to Iran. Russian President Vladimir Putin’s government has now announced that, against the backdrop of the emerging Iran nuclear deal, he has decided to cancel the freeze and go through with the transaction.”
http://www.jpost.com/Middle-East/Analysis-Russias-decision-to-sell-S-300-to-Iran-makes-military-option-less-viable-398060