On December 7, 1941, Japanese planes surprised the U.S. at Pearl Harbor and unleashed an attack that would be known as the Date of Infamy. Now, only second to the World Trade Center attack, it was the worst day in U.S history. The USS Arizona received a direct hit and sank. As a result, 1,177 people lost their lives. Many of the bodies still remain in the sunken ship.
The memorial, which was dedicated in 1962, straddles the USS Arizona but does touch it. The memorial is only accessible by shuttle boat which is operated by the National Park Service. The Memorial Visitor Center was opened in 1980 and on May 5, 1989 the sunken ship was declared a National Historic Landmark.
PEARL HARBOR, HAWAII (HI) UNITED STATES OF AMERICA (USA) DoD photo by: PH3(AW/SW) JAYME PASTORIC, USN
The memorial was designed by Alfred Preis, a Honolulu architect. The United States Navy had given specific instructions to Preis that the memorial be like a bridge, floating above the ship, but not touching it. They also wanted the memorial to be able to accommodate 200 people.
The memorial structure is 184-foot long and has two peaks at each end connected by a sag in the center of the structure. The shape is meant to represent the peak of American pride before the attack, then the sudden sadness of the United States after the attack and then the rise of America again to new heights after the war.

Originally from [http://en.wikipedia.org en.wikipedia]
Preis describes the architecture Arizona Memorial as, “Wherein the structure sags in the center but stands strong and vigorous at the ends, expresses initial defeat and ultimate victory … The overall effect is one of serenity. Overtones of sadness have been omitted to permit the individual to contemplate his own personal responses … his innermost feelings.”