The story of what Hurricane Katrina did to the park is pretty interesting. Besides damaging a lot of the ground-level aircraft exhibits, the surge knocked the battleship six degrees off the vertical, and getting it back level again was quite an engineering feat. The submarine had already been raised up on blocks so it wasn't affected as much. Last time I was there I had a great conversation with two of the volunteers in the submarine who were overseeing extensive repairs to the vessel.
