After disagreements between Presidents Obama and Karzai came to a head recently, reports indiciate that the United States is considering a "zero option" in Afghanistan. This would mean a total withdrawal of all troops by 2014. Obviously this would lead to huge negative implications for the security of the Afghani state. For one, the United States taxpayer currently pays for 50% (yes, half) of the annual expenses of the Afghan government. If we pull all troops out, that percentage will certainly fall.