军用背包厂家A U.S. Air Force pararescueman from the 46th Expeditionary Rescue Squadron sits with an ambulatory Afghan National Army soldier after providing him with a Fentanyl lollipop during a medical evacuation mission in the Kandahar province of Afghanistan Aug. 7, 2010. (DoD photo by Master Sgt. Samuel V. Ameen, U.S. Air Force/Released)