The part 1 thread got long, so I thought I'd use some common sense to answer that question: If they are here, why are we still there? Well, "over there" back in 2000, they had lots of training camps. It's where guys who wanted to do jihad trained so their bombs would work and they could kill lots of people. So, we went and exterminated those training camps, and are still there to prevent them from coming back. Why is this important? Well, so guys like the underwear bomber and this latest Islamic lunatic in NYC won't succeed. So they aren't trained well, and thus, their bombs fail. As both of theirs did. If we leave from "over there", the camps will come back, and the training will resume. Then, their bombs will work better, like they did in Beruit or Mali or at the embassy bombings, or the USS Cole. And that, not oil, is why we are "over there".