To "win" in Afghanistan now we would have to remove the government we installed and find some way to install one that wasn't corrupt from a cesspool of corruption.
I'm (sort of) with BRC on this one. If we're going to stay there then we put all of our troops in bases outside of populated areas. They only leave to kill someone and then they go right back. We have drones up in the skies in huge numbers. If one goes down to enemy fire everyone in a half mile radius of the drone dies, no questions asked.