"Following two high-level policy reviews on Afghanistan in 2009, the Obama Administration asserts that it is pursuing a fully resourced and integrated military-civilian strategy that will pave the way for a gradual transition to Afghan security leadership beginning in July 2011. The policy is predicated on the view that stabilizing Afghanistan will ensure that it cannot again become a base for terrorist attacks against the United States, and that accomplishing this objective requires reversing a deterioration of security in large parts of Afghanistan since 2006. Each of the two reviews resulted in a decision to add combat troops, with the intent of creating the conditions to expand Afghan governance and economic development, rather than on defeating insurgents. A total of 51,000 additional U.S. forces were authorized by the two reviews, which will bring U.S. troop levels to approximately 104,000 by September 2010. Currently, U.S. troops in Afghanistan total about 95,000 and foreign partners are about 40,000."
CRS Report for Congress, RL30588