pete, - the very idea of non-proliferation is about preventing countries who do not possess these weapons from getting them. we can regret & keep regretting forever the fact that some countries have already obtained these weapons, incl. some fairly recently. but we're gonna get nowhere that way. this is not some childish symmetry game. "you have, so i must have." actually, in today's world a mandatory non-proliferation regime should've been imposed, via UN, to all the world's nations still without nuclear weapons (not very likely to happen). the situation is seriously risky. you only need one match now to be lit, especially in the ME, for this to spin entirely out of control. so iran remains THE key country to prevent from going nuclear. one can wish for, work for reducing the weapons already in existence, incl. starting a process towards nuclear-free zones. but only as a parallel task. NP can't be made contingent on global nuclear disarmament. that's never gonna work.
Report: Iran's Culture Ministry refuses to allow Barenboim to perform in Tehran (DPA)