According to the British newspaper The Telegraph, Iran and Russia are reportedly in negotiations over the supply of the S-400 air defense system. The report claims that Mohsen Rezaei, head of Iran's Supreme National Security Council, delivered a personal letter from the supreme leader of the revolution to Russian President Putin on Thursday. According to reports, Tehran hopes to purchase these systems. Post article: The Telegraph is not a reliable source. However, assuming that there is any possibility, it should be noted that given the experiences of the last two wars and the war in Ukraine, and the demonstrated effectiveness of systems in the S-300/400 class, this action does not make sense.