US Marine Lance Corporal Sean Brunner from 3rd Light Armored Reconaissance (LAR) Battalion 2nd Marine Division (Forward) lifts a truck tire, as the Marines Corps named "tire flip" for physical exercises at Forward Operating Base (FOB) Payne in Reg district, Helmand province on April 21, 2011. There are around 130,000 international troops in Afghanistan fighting a Taliban-led insurgency that has lasted for nearly 10 years. (BAY ISMOYO/AFP/Getty Images)
