Secondly, Deir az-Zor is the area of Syria from which the Islamic State exports most of its oil. Again, this inevitably begs the question of whether the Islamic State attack on the base - and the air strike seemingly carried out in support of it - was in some way connected to the illegal oil trade, and might have been intended to protect it.Thirdly, there is the obvious question of which countries’ aircraft were involved.
The Russians are not identifying these countries - at least for the moment - though they obviously know or think they know which they are. The one thing however that the Russians are saying is that the aircraft of more than one country was involved.The Russians are also drawing attention to the US’ failure to admit to the presence of the aircraft of these countries, which strongly suggests that the US is protecting them, whichever countries they are.Lastly, it is interesting that the Russians seem to be so well informed about this incident. If the Russians do indeed know how many aircraft from the US-led coalition were flying at any one time over Der az-Zor, and can identify the countries they belong to, then the inescapable conclusion is that their surveillance and intelligence operation in Syria is very effective indeed.