Tech. Sgt. Robert Huston, 60th Aerial Port Squadron aerial porter from Travis Air Force Base, Calif., carefully checks a row of cargo pallets in the aerial port on Bagram Airfield, Afghanistan, on April 11, 2011. Due to the port being the busiest of its kind in all of the Department of Defense, every pallet must be carefully checked prior to shipping to prevent errors or delays in troops getting cargo they need at forward operating bases. (U.S. Air Force Photo/Staff Sgt. Patrick Harrower)