Nation-building is a multi-generational project, and we clearly don't have the stomach for it anymore. Therefore, our mission needs to be one that can be accomplished with less long term commitment. From here on in, when someone acts against the US, our policy needs to be that we will hunt them down and kill them, regardless of where they hide, and any nation that harbors them is subject to the full wrath of our reprisals. That wouldn't mean boots on the ground, necessarily, but in the case of Afghanistan, we should have gone in, wiped the floor with the Afghan Taliban and put their enemies in charge, then left them the means to run the place with as much brutality as required. In the case of Pakistan, at the very least, it should have entailed a cutoff of aid. Saddam should have been overthrown, as we did, and replaced by the Kurds, who understand the value of loyalty and are not afraid to fight.