Iran says Israeli threats are a 'childish game' - Via Drudge. You can call Israel's military action in the past a great many things, but "childish game" just doesn't really seem to apply, does it? I think the president of Iran is tired of being president, as that is the only reasonable explanation for taunting countries like the U.S. and Israel. In stead of just stepping down, maybe he figures he will wave a nuclear bomb in the face of the world and wait for the air strikes to "relieve" him of his command.
Also, Allah has some interesting links about Iran's nuclear testing. Scary stuff.