Airmen from the 71st Aerial Port Squadron exchange parts of a K loader during a training mission at Langley Air Force Base, Va., Nov. 2, 2013. The 71st APS is an Air Force Reserve unit that provides the military logistical functions of processing personnel and cargo, rigging for airdrop and packing parachutes. (U.S. Air Force photo by Staff Sgt. John D. Strong II/Released)