d2,
If you could, please define "imminent/urgent danger" much more specifically in the context of pre-emptive military action.
For example, we know it is a given that the 9-11 attacks were hatched and organized in camps in Afghanistan, so at what point would it have been acceptable under your paradigm of pre-emption would it have been corect for the US to invade Afghanistan to prevent the Al-Qiada attack on 9-11?
For what it is worth, in my opinion, I believe that the US should have given the Taliban an ultimatum to hand over Bin Laden & Co. just after the USS Cole was bombed in October of 2000. Had they refused, I believe the US would have been justified in invading in order to prevent future attcks on the US and its interests. Agree, disagree? Reasons?
"Yeah, well, that's just, like, your opinion, man." - The Dude, 1998