Nope.Nothing credible has proven that Iran has nukes.Except of course from the words of mouth passed by others.

By the way,I'll ask you.Why should we trust U.S that Iran could be a threat?

If Iran developed nukes they would become a threat. Nobody in the west wants nukes flying around anywhere in the world. The situation in the middle east has, and probably always will be very unstable. All it would take is for Israel to p*ss Iran off or vice versa, and there would be nuclear war. No matter where in the world the war is, the devestation will be on a global scale. Remember Chernobyl???

More to the point should we believe the same people (US and Israeli intel) who told us exactly the same stuff about Iraq and their immaginary nukes.....which were similarly supposedly "only 6mths away from full scale deployment!," too.