- Lain: Russia is angry that the US has not fulfilled its side of the bargain
- Russia wants to fight the conflict in Syria on its own terms
Sarah Lain is a research fellow in Russia and Eurasia studies at the Royal United Services Institute in London. The opinions expressed in this article are those of the author.
(CNN)Russia and the US have returned to diplomatic stalemate on Syria, proving that even when agreement in principle has been reached, such agreement is far from any guarantee of implementation.