I don't know about you, but I lie awake nights worrying about Canadian uranium. I know these people. I grew up there. You have no idea what they're capable of doing. If Sidney Crosby hadn't scored that goal to win the Olympic gold medal, there's no telling what might have ensued.

If fences don't work, why is there one around the White House.

When under attack, no country is obligated to collect permission slips from allies to strike back.

I think the first thing is to recognize a mistake that Obama made. And others have made in thinking that you can revolutionize a system that's unbelievably complex and interlinked, one-sixth of the economy. That was a mistake because whenever you change one thing, it changes 80 other things, and now if you're changing everything at once, you have no idea what the outcome is going to be and you get all of these unintended side effects.

The indecisiveness and ambivalence so devastatingly described by both of Obama's previous secretaries of defense, Leon Panetta and Bob Gates, are already beginning to characterize the Syria campaign.

The war is not going well and it is time to say why. It has been fought with half-measures. It has been fought with an eye on the wishes of our "coalition partners." It has been fought to assuage the Arab "street." It has been fought to satisfy the diplomats rather than the generals... Why have we not loosed the B-52s and the B-2s to carpet-bomb Taliban positions? And why are we giving the Taliban sanctuary in their cities? We could drop leaflets giving civilians 48 hours to evacuate, after which the cities become legitimate military targets.

Where there is a confluence of interests among nations, as, for example the swine flu or polio, you can get well functioning international institutions like the World Health Organization. And you can act. Climate change is different, because the science remains hypothetical and the potential costs staggering.