In 1958, the veteran World War II Fletcher Class Destroyer USS Killen (DD593) served as a target ship for wreckage during the atom bomb tests in Operation Hardtack I (shots WAHOO and UMBRELLA). In 1962 it was engaged in highly explosive tests in the Chesapeake Bay to assess the structural effects of the ship's nuclear exposures. "Killen" was struck from the Naval Vessel Register and sent to the US Naval Station at Roosevelt Roads in January 1963 to be used as a target ship for missile and gunnery practice, where she was eventually sunk/scuttled in a shallow bay in 1975 and still lies as of 2010.