On May 19, 1998, Dr. Robert Ballard, discoverer of the sunken ships Titanic and Bismarck, discovered the USS Yorktown. The Yorktown was an American ship lost in the Battle of Midway, the US-Japanese naval battle that turned the tide in the Pacific Theater of World War II. The National Public Radio site contains a five minute All Things Considered RealPlayer interview with Dr. Ballard that took...