Here is a pretty good commentary.

Also, Russia AWACS (A-50U) have been seen in the skies over Syria.  That provides Russia with a quantum leap in the detection of low-flying (cruise missiles) and low-RCS (stealth) objects.

The Essential Saker II: Civilizational Choices and Geopolitics / The Russian challenge to the hegemony of the AngloZionist Empire
The Essential Saker: from the trenches of the emerging multipolar world