A Soldier from the U.S. Army Reserve’s 326th Quartermaster Company (Water Storage and Distribution) provides local security while filling a Compatible Water Tank Rack, or "Hippo," during Warrior Exercise 78-15-01 at Fort A.P. Hill, Va., Jan. 17, 2015. The 78th Training Division’s WAREX is one of several U.S. Army Reserve exercises involving active duty, National Guard, Army Reserve and U.S. Navy personnel. (U.S. Army Photo by Master Sgt. D. Keith Johnson/Released)