Spc. Alaina Rozmus, a water treatment specialist with 40th Composite Supply Company, 45th Sustainment Command, explains how the Aspen 2000 water purification system purifies water and is stored in a water collection point during a weeklong field-testing and train-the-trainer exercise on Schofield Barracks, Hawaii, Feb. 9-18. Soldiers with the 40th CSC will be the first unit in U.S. Army Pacific to field test the Water in a Box system. (U.S. Army photo by, Staff Sgt. Kyle J. Richardson, USARPAC PAO)