What actually happened in Iran yesterday.
Russia had already received approval from Iran and Iraq to fly warheads through their air space to reach Syria. Wednesday their first attack had been successful, Thursday however, there were some issues, namely not all the warheads made it to Syria.
Russia launched 26 cruise missiles from warships in the Caspian Sea, 4 of them never made it and landed in Iran, there have been no reports of casualties or structural damage. Naturally Russia has denied this incident.
Does this make a difference?
Iran and Russia are on the same side in Syria, both supporting Syrian leader Bashar al-Assad, but there have been growing reports of tension and competition between them over Syria's future. And there is a long history of bitterness between Russia and Iran, the latter of which has not forgotten Russia's imperialist history in its country, nor Russia's support of crippling UN sanctions.
Iran might not be fully up to date with Putin’s land grab programme as he secures his deep water ports in the Mediterranean and consolidates his position in Syria, Putin will not mind who runs Syria as long as they are tied into to Russia.
Another point to realise is with Russia in Ukraine, Crimea and now Syria, Turkey a NATO ally must be feeling a little squeezed.