Everyone, even Wesley Clark, acknowledges that bombing was not the best solution. Current thinking on  R2P enforcement is that no good military solution exists.

Then the constraints placed on the intervention weren't placed there by the military, but by their respective home governments. The biggest one being that nobody wanted to put troops on the ground in there. A lot was said during the campaign...how there weren't enough casualties to make it a genocide. That there was no proof that the 11,000 NATO estimated killed by the Serbs actually were (eventually this number was later shown to be pretty much spot on). Many feel that the military option makes matters worse. Starting April 6, I'm planning a diary (or a series) about the Responsibility to Protect, probably in way too much detail, but suffice it to say that the current sub rosa debate going on in the foreign policy community is very mindful of this.

But this is getting away from the issue of NATO. As for the bombing campaign in Kosovo, targetting a regime which had already committed one genocide and gotten away with it, NATO was awfully handy. I won't say European governments dragged the US in. It wasn't that, it was ultimately the very public outcry in the press that dragged everybody in. Kosovo was CNN's genocide moment in a way that Rwanda never managed to become.

"It Can't Be Just About Us"
--Frank Schnittger, ETian Extraordinaire