The problem (if it is a problem) is that Russia will not gain anything serious (except its umpteen planes shot down) unless they start a land operation. Bombing was what the West has been doing on and off for a couple of years and it didn't really change the balance between the beligerents. If Putin means business he ought to send his little beige (I think they will use this camouflage color) men. But if he does he will be bogged there for eternity (as he is in Donbas). So he has to choose - to send men and propel Asad into the offensive (but risk reputational damage at home and have no chance for reversal of his actions) or continue bombing and remain just one more nuisance for the bombed and one more target for their stingers.
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