I-401
A large World War two Japanese submarine has been found on the sea bed off Oahu. The sub was captured at the end of the war whilst on a mission to drop germ bombs on US cities, or bomb the Panama Canal, using the folding wing bombers it could carry in its hold. When Russia wanted to inspect I-401 it was scuttled to keep the secrets of the largest pre nuclear submarine from them.
Technorati tag: World War 2, Hawaii