Tech. Sgt. Clarence Marshall, (kneeling) 71st Aerial Port Squadron aerial porter, demonstrates the proper placement of a pallet side net to participants in a joint contingency-training exercise at Fort Eustis, Va. Aug. 4, 2011. Participating units included the 71st APS, the 633rd Logistics Readiness Squadron and the 690th Rapid Port Opening Element. (U.S. Air Force Photo by Chief Master Sgt. Chris Alston/Released)