Eric Nelson, a civilian contractor with U.S. Army Rapid Equipping Force, explains how the Water in a Box system works to a U.S. Marine Command Sergeant Major during a weeklong field-testing and train-the-trainer exercise using the Aspen 2000 water purification system coupled with a water packaging trailer on Schofield Barracks, Hawaii, Feb. 9-18. The WiaB systems allows forward deployed units to become more self-sufficient. (U.S. Army photo by, Staff Sgt. Kyle J. Richardson, USARPAC PAO)