DAHLGREN, Va. (June 3, 2015) - Udo Goff, a Naval Surface Warfare Center Dahlgren Division (NSWCDD) defense contractor and avid collector of World War II artifacts, explains the unique histories behind various Normandy D-Day invasion items to Jon Dachos, an NSWCDD Human Systems Integration lead engineer. Goff's D-Day collection was on display at the command's Electromagnetic and Sensor Systems Department lobby. (U.S. Navy photo by John Joyce)