Potable Water Device Army Pfc. Allen Pattison, right, briefs Army Gen. Frank Grass, chief of the National Guard Bureau in Pacific, Mo. on the capabilities of the Army's 2,000 gallon hippo system Jan. 5, 2016. Missouri Army National Guard photo by Staff Sgt. Christopher Robertson SHARE: Download: Full Size (1.37 MB) Tags: photo essays, missouri national guardsmen missouri flooding, all images Credit: Christopher Robertson VIRIN: 160106-Z-XXOOO-003.JPG Photo Gallery