USS Arizona Memorial
Oil leaking from the sunken battleship can still be seen rising from the wreckage to the water's surface. This oil is sometimes referred to as "the tears of the Arizona" or "black tears." In a National Geographic feature published in 2001, concerns were expressed that the continued deterioration of the Arizona's bulkheads and oil tanks from saltwater corrosion could pose a significant environmental threat from a rupture, resulting in a significant release of oil. The National Park Service states it has an ongoing program that closely monitors the submerged vessel's condition.