The best thing that could happen in Iran is that all their nuclear reactors simultaneously melt down. I'd love to see the entire population incinerated.
Besides, it makes no sense--their entire population isn't our enemy. Keep up with the pro-democracy movement among the young. Iran practically lost a generation to war with Saddam and the young generation there, well, I'd like to trade some of them for some of ours--they've got more respect for liberty and freedom. And say nicer things about the US.