HONOLULU (AP) — William Edward Mann enlisted in the Navy after graduating from high school in rural Washington state. A guitar player, he picked up the ukulele while stationed in Hawaii.

He's been presumed dead since Dec. 7, 1941, when Japanese planes bombed Pearl Harbor and set off a massive explosion that sank his battleship, the USS Arizona, launching the U.S. into World War II.

Now, his niece is among some families of crew members who are demanding the U.S. military take advantage of advances in DNA technology to identify 85 sailors and Marines from the Arizona who were buried as unknowns....