Do U.S. Troops Really Need to Stay in Afghanistan?

A recent post on the "Defense One" blog asks the question "Do U.S. Troops Really Need to stay in Afghanistan?" The question is asked (I think) in response to recent interviews by ISAF saying that the Afghan National Security Forces have held their own against the Taliban with minimal assistance from ISAF. Read more in "Do U.S. Troops Really Need to Stay in Afghanistan", Defense One, January 23, 2014.