Quote from skeptic123:
Israeli bombing of the Iraqi nuclear reactor is probably the most successful example of a preventive action. The whole world was against that bombing, it took 10 years for Israel to get vindicated and to prove it was a right thing to do. And if they did not, Israel would not exist by now, nor would Kuwait, nor would Saudi Arabia.
I think the Israeli bombing was a GREAT mission, but there is a huge difference... They knew where the reactor was... we don't know where all the WOMD, if they exist, are in Iraq. And we can think about what would have happened all we want (you're probably right), but the key is that Israel knew what would have happened (from human intelligence, etc.) and they didn't have any other options. The world wouldn't have backed a containment policy, and Israel didn't have the military power to do it on it's own.
I'm sure if Israel had the power, they'd have done the same or worse.