U.S. Air Force C-130 Hercules aircrew members discuss their mission during a pre-flight briefing for an airdrop mission on Bagram Airfield, Afghanistan, Aug. 2, 2013. The crew is assigned to the 774th Expeditionary Airlift Squadron. C-130 aircrews ensure that troops have adequate supplies of food, water and fuel to complete ground operations. (U.S. Air Force photo by Staff Sgt. Marleah Miller)