Dan, Jonah: Reports out of Libya are horrifying, but I think we want to be careful about stumbling into policing Libya. I’m guessing more people are being killed by machine guns on the ground than from the air. Are you going to bomb those machine guns and the ground forces wielding them, too? If not, you’ll look ineffectual. If so, you’re probably in for a full-blown humanitarian intervention. And remember: There will be accidents, and tribes aren’t good at forgiving and forgetting, no matter how pure your intentions.