Lt. Col. Christian N. Dietz (left), Walla Walla District’s new commander, receives the Corps colors from Col. Torrey A. DiCiro (right), commander of the Corps’ Northwestern Division. Dietz assumed command of the U.S. Army Corps of Engineers, Walla Walla District, during a July 20, 2018, ceremony at the Marcus Whitman Hotel and Conference Center in downtown Walla Walla, Washington. Col. DiCiro presided over the ceremony.