He may not have any methods of communications to relay his orders to those that control those weapons. And even if can give the order, there is no guarantee that those in the field will follow his orders. The guy is a douche bag who has killed hundreds of thousands of his own citizens. I doubt that has engendered much loyalty amongst his troops.
As far as Cuba and Zimbabwe are concerned, they don't threaten us directly. That is bad news for the civilians who live under those totalitarian regimes.
Our resources are limited, and we cannot save every soul on the planet. Marxists will continue killing their civilians for decades. Those bastards killed 100 million this century, to the cheers of the NY Times and other leftists in this country. But eventually, freedom will out, and liberals will have to find new outlets for their blood lust.
As far as NK is concerned, Kim Jong Il has some decisions to make. He may have looked at Afghanistan as a fluke, but he can't any longer. He has to decide if he wants to be the next tough guy to take on the Amercian military regime.
Jong is a total psychopath. But I think China may knock him back into his box. China doesn't want the US to project their military might into Asia in the way they have in the Middle East.
The bottom line is that US military power is the only force on earth that can bring peace to this planet. Hippies can sing kumbaya till the ozone hole is filled in, but they can't protect my children or yours from being killed by islamic fundamentalists or any other group of blood thirsty villians.
One reason is that Saddam never believed he would lose control. Another is that they have been threatened with summary execution for months.
The stuff is there. We know it.