Moscow moving closer to selling S-300 missiles to Tehran

Russia took another step toward supplying advanced S-300 antiaircraft missiles to Iran on Monday, as its state-owned arms exporter Rosoboronexport said it is preparing a contract for such a sale.
DEBKAfile's military sources: The planned sale, following the recent deployment of the S-300 in Syria, shows that Russia is building a unified air defense system, centering on the S-300, for Iran, Iraq, Syria, Hizballah and Lebanon.