A walking stick that was used on the Titanic has become the center of a dispute. The cane was owned by a wealthy first-class passenger on board the doomed ship, which sank in 1912 after it hit an iceberg. The cane is being put up for auction by a descendant of White's. It's believed it could fetch as much as $500,000. But another descendant, Samuel Hoving, is disputing ownership. He says the cane was in his father's possession for years until it mysteriously vanished.