If I'm not mistaken the USS Iowa was the last battleship to fire it's 16-inch guns (at Lebanon in the 1980's). She was retired after a tragic explosion in her forward gun turret resulted in the death of many sailors. The investigation into the cause was a dark day for the US Navy, and she ended here at the mothball fleet near Martinez, CA. I have sailed close to her several times, and she still has that lethal quality about her.