Time to Get Out of Afghanistan

http://www.washingtonpost.com/wp-dyn/content/article/2009/08/31/AR2009083102912.html
U.S. forces are being increased by 21,000, to 68,000, bringing the coalition total to 110,000. About 9,000 are from Britain, where support for the war is waning. Counterinsurgency theory concerning the time and the ratio of forces required to protect the population indicates that, nationwide, Afghanistan would need hundreds of thousands of coalition troops, perhaps for a decade or more. That is inconceivable.