Iran and Russia are negotiating the S-400 air defense deal Iran and Russia are negotiating the supply of advanced S-400 air defense systems, according to the Telegraph Iranian Defense Chief Mohsen Razai delivered a personal letter from Supreme Leader Mujtaba Khamenei to Vladimir Putin on Thursday Tehran is optimistic about the security of the systems it has sought for years Iran hopes to rebuild its air defenses after this year's attacks by the US and Israel Moscow may hesitate due to its air defense needs against the backdrop of attacks by Ukrainian drones and missiles, and fear of relations with Israel and other regional countries may weigh on the decision.

Iran and Russia are negotiating the S-400 air defense deal Iran and Russia are negotiating the supply of advanced S-400 air defense systems, according to the Telegraph Iranian Defense Chief Mohsen Razai delivered a personal letter from Supreme Leader Mujtaba Khamenei to Vladimir Putin on Thursday Tehran is optimistic about the security of the systems it has sought for years Iran hopes to rebuild its air defenses after this year's attacks by the US and Israel Moscow may hesitate due to its air defense needs against the backdrop of attacks by Ukrainian drones and missiles, and fear of relations with Israel and other regional countries may weigh on the decision.