We all know that President Bush is a liar, and that the current U.S. administration has no credibility.
We also know, that Iran's president Ahmedinejad has said, that "Israel should be wiped off the map". But why say such a crazy thing, unless you really mean it?
In other words: you can be sure, that Ahmedinejad is not lying when he say that.
Recently the Iranian president has also said, that Iran is not trying to develop nuclear weapons, because WMD is prohibited by Islam.
Of course it would be a little naive just to believe this, but there actually are some signs, that this might be true. Read an interesting article about this on my blog Essays & Articles.