this map shows some of the air defenses on oahu prior to 1941. this shows some of the army defenses prior to 1941. it was believed that the idea of attacking oahu would be impossible by any enemy, but the advance of aircraft and aircraft carriers made that a very probable prospect. we also have interactive exhibits like this one, in which you can actually spin these dials, hit this button, and then try to detect the japanese force coming into oahu. in fact, in actuality, the japanese strike force got within 230 miles of oahu, and then launched 150 aircraft toward the island. so when you really think of this to the audience that comes into the museum, this was an attack on oahu. and i guess interpreted for them it wasn't just pearl harbor, but to look at oahu as a battlefield. also, there was this change. the age of the battleship demonstrated by this model of the "uss arizona" as she looked in 1941. these large shells you see standing side by side here, like this one, is a 14-inch shell. this is the type of shell the arizona would fire, and had a