PORTSMOUTH, Va. -- An underwater survey found what might be remnants of the Confederate ironclad warship Virginia, the former USS Merrimack that fought the Union's ironclad Monitor in the 1862 battle that redefined naval warfare. "It would be a stroke of incredible luck to discover it after all these years," said Dick Hoffeditz, curator of the Virginia War Museum in Newport News. The underwater survey, for the proposed construction of a marine terminal on the Elizabeth River, describes two shipwrecks in the area and says there is "a distinct possibility" that they might be parts of the Virginia and of...