I am sorry, did I say the US is trying to control the spread of nuclear weapons? I have no comment on the Iran situation, my response was to Peterstorey's comment mentioning India's nuclear capability in a list of some other countries. Neither did I. But India has a declared no-first-use policy. Reiterating, my response was to stress on the fact that India is a separate case, not to be clubbed together with Pakistan/DPRK simply because all these countries are nuclear capable. No. It would be the same old story if a third power were to arm Iran to counterbalance Israel. Iran by all accounts is developing their capability in-house, with no direct aid from any world power. Pakistan and DPRK were directly aided by China.