Are there any new wars we should be willing to fight?
By "new", I mean potential conflicts that we are not currently engaged, but could be if the circumstances fall just right.
3) North Korea?
4) Something else that is escaping my mind at the moment?
The only one that I could say 'yes' to is North Korea... and then ONLY if they do something incredibly stupid such as a direct attack/invasion of South Korea. I wouldn't want to, but I think we'd have no choice.