U.S. Soldiers assigned to the 689th Rapid Port Opening Element rig a high-mobility multipurpose wheeled vehicle to a CH-47 Chinook during sling-load training at Fort Eustis, Va., March 24, 2016. Sling-loading allows Soldiers to move equipment and cargo in harsh locations where roadways are unusable to transport vital materials. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)