Syria's Uncertain Air Defense Capabilities (CSIS)

Updated Syrian air force and air defense capabilities (Institute for the Study of War)

Nyet! Now Russia Won’t Sell Badass Missile to Syria (Wired, Danger Room blog)

5 Questions on Russian S-300 Missile System Sales to Syria (RIA Novosti)

A last-minute effort to kill Syrian S-300 deal (Flight Global, Ariel View blog)

Tensions high between Russia and Israel over S-300 missiles (Flight Global, Ariel View blog)

Reports: Russia Has Not Delivered S-300 Missiles to Syria (DefenseNews)

Hey, i read the first article and found it pretty interesting. Looking forward to reading the follow ups.