The antagonistic relationship between Russia and the US which had developed has been reversed. The FACT is that no substantial evidence exists of an Iranian weapons program. There are several points which cause suspicions that one exists, I share them. The important point is that both Russia and even China are not opposed to future sanctions if Iran remains totally intransigent. Both nations do not want to see Iran become a nuclear weapons power. You should all bear in mind that Russia was the original target of what became Al Queada. Russia has actually fought wars on it's own soil against Islamist Terrorist Insurgencies. So is China. . .
from the article: Putin: Russia has no evidence Iran trying to build nukes