Battle of Pearl Harbor

Pearl Harbor Naval Shipyard / Facebook

A historic dry dock at the Pearl Harbor Naval Shipyard turned 100 years old this week. But to last another 100 years, it will need billions of dollars in upgrades.

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Although it has been 77 years since the surprise attack on Pearl Harbor that brought the United States into World War II, many American servicemen killed in the battle have yet to be identifed. But that is beginning to change. Technological advancements are allowing forensic scientists at the Defense POW/MIA Accounting Agency to determine the identities of hundreds of Americans who were buried as unknowns.