Great article on Al Jazeera about why the U.S. will not leave Afghanistan.

"All that we have to do is to send two mujahedeen to the farthest point East to raise a piece of cloth on which is written al-Qaeda in order to make the generals race there to cause America to suffer human, economic, and political losses without their achieving for it anything of note, other than some benefits to their private companies."
-Osama Bin Laden