U. S. Army tugboats docked at 3rd Port on Fort Eustis, Va., render a water-canon salute during a change-of-command and change-of-responsibility ceremony, July 20, 2012. Lt. Col. Megan Gumpf took command, and Command Sgt. Maj. Scott Reed assumed responsibility of the 10th Trans. Bn. (U.S. Army photo by Staff Sgt. Alexander Burnett/Released)