The world now anticipates that the US will reach a strategic agreement with Iran. Russia and China are responding by offering their own deals to Tehran. A possible game-changer is Russia’s offer of the Antey-2500 air defense system to Iran.
After canceling the planned delivery of the older, shorter-range S-300 system in 2010, Russia has now escalated drastically by proposing to sell Iran a much more effective system.
Western air forces have never engaged the Russian system, so we don’t know how exactly good it is. No-one I know in the military wants to find out; by Western estimates, the Russian systems are extremely good. It is possible that Russia’s unwelcome intervention might make Iran effectively impregnable from attack by Israel. More …