Also, I think that Iran is not supported by Russia and China as much as it should.
Russia and China and Iran is like UK and US and the Soviet Union just before WWII... not really friends as such an not a huge amount in common really.
But the invasion of most of Europe by Germany and the threat of UK invasion by Germany and suddenly the UK was feeling very isolated and vulnerable and keen to find as many big powerful friends as it could find... for a while it forgot all its hatred for its large european land rival of the Soviet Union and all it saw was a country that was big enough and stubborn enough to take on Germany on equal terms and not lose. When Germany declared war after the Japanese attacked the US at Pearl Harbour, the UK realised it was going to win...
After the war the friendship was no longer needed by the UK and US so they dropped the Soviets like a hot rock.
There is a similar relationship between China and Russia and Iran... they all feel the threat of the US but have no reason to fully trust each other has their back.
Russia and China are moving together because they realise each one alone will be vulnerable, but with the combination of technology which in many ways they compliment each other, and war fighting experience and skill... which you could argue the Chinese lack but Russia has in abundance... not to mention the enormous Chinese population which on its own could sustain the Chinese economy but also the Russian one too even if no one else in the world would trade with either country, then you start to see that cooperation between the two countries makes a lot of sense...
If they can make it work they create a power centre that other countries can attach to and grow from without the petty rules and restrictions the west likes to put on its non aligned trading partners to stop them developing and growing and becoming independent.
If the Russians and Chinese can get things going and other countries can grow and develop they will make the centre stronger and more powerful... the west is actually rather weak because of its fixation of centralisation... it is too america focused... and America uses tools like NATO to stop cooperation between the EU and Russia or China which limits the growth and potential of the EU... which is exactly what the US wants... it doesn't want a rival... NATO without the US is nothing... and that is the way they want it... an expensive dumping ground for US military equipment... buy it or you are out of the club... Turkey...
I'm sure the US knows what's going on with Iran missile program no less than with NK & Pakistani 1s.
I am sure the US intel are very professional, but they are working for retards who demand evidence to prove something whether it is true or not and don't tell me anything that contradicts what I want... don't tell me Saddam has no WMDs... tell me he has them ready to deploy in 45 minutes based on third party reports of Uranium yellow cake from Africa...
Half of the intel the US acts upon comes from people who are defecting who know exactly what the US wants to hear and they will say that whether it is true or not.
I am an Iranian scientist and I don't want to get shot by Mossad so if you give me a nice cushy job at JPL or NASA with a 500K per year salary and a nice big house for my family (excluding my mother in law) and I will tell you that Iran has made 7 nukes and is just waiting for an excuse to show them to the world... the locations of the weapons are under my mother in laws house, the place she works during the day, the place where she does yoga, and the church where she prays... it is all underground... you can't see it, but it is there...