Lt. Gen. William "Butch" Graham, commanding general of the U.S. Army Corps of Engineers and 56th chief of engineers, walks with Tommy Long, resident engineer for the Nashville District, and ahead of Allen Malcomb, chief of quality assurance for the Chickamauga Lock Replacement Project, during a visit to the Chickamauga Lock on Dec. 19, 2024, in Chattanooga, Tenn., along the Tennessee River. (U.S. Army Corps of Engineers photo by Noe Gonzalez)