LST 325, a World War II-era ship used in Normandy D-Day operations decades ago, navigates through Cheatham Lock in Ashland City, Tenn., between 12:30 and 2 a.m. this morning. Tours of the historical "Gray Lady" are being offered at Riverfront Park in Nashville, Tenn., 9 a.m.-5 p.m. daily from Sept. 18-24, 2012. (USACE photos by Fred Tucker)