Sailors aboard the guided-missile destroyer USS Chung-Hoon (DDG 93) salute as the ship conducts a pass-in-review by the USS Arizona Memorial during the 73rd anniversary Pearl Harbor Day commemoration ceremony. More than 2,000 guests, including Pearl Harbor survivors and other veterans, attended the National Park Service and U.S. Navy-hosted joint memorial ceremony at the World War II Valor in the Pacific National Monument. This year's theme focused on "Preserving the Memory." (U.S. Navy photo by Mass Communication Specialist 1st Class Katherine Hofman/Released)