An Afghan interpreter working with the 101st Airborne Division Alpha Battery 1-320th displays a patch showing the Afghan and US flags at Combat Outpost Nolen on the outskirts of Arghandab valley's Jellawar town on September 9, 2010. The United States and NATO have 150,000 troops in Afghanistan aiming to quell the insurgency that began soon after the Taliban regime was overthrown in a US-led invasion in late 2001. (PATRICK BAZ/AFP/Getty Images)