U.S. Air Force Tech. Sgt. Marshall Johnston drops mud on the side of an irrigation creek at Kanuma City, Tochigi Prefecture, Japan, Sept. 15, 2015. Johnston is a structures craftsman assigned to the 374th Civil Engineer Squadron. Johnston used mud taken from a clogged irrigation drain to fix an eroded creek wall that was leaking into a farmer's field. U.S. Air Force photo by Staff Sgt. Cody H. Ramirez