ROTFL. That was good Matt D!
VonRichtofen, just prior to the attack on Pearl Harbor-I can't remember how far in advance, but it wasn't much, U.S. and British cryptologists thought they had received codes from the Japanese that might signal which way Japan's military might move. I can't remember the exact message, but, for example, if Japan were to attack the Soviet Union in 1941, a message like "East wind rain" would be sent; if an attack against British interestes were to take place, the message would have said something like "north wind gale", and against the U.S. "west wind clear". Something to that effect. They weren't 100% sure that's what it meant, but they had some ideas about it.
The message against the U.S. was apparently sent to Japanese embassies and intelligence services prior to Dec 7, 1941, but, as in this message that the U.S. got prior to 9/11, it did not disclose specific intention.
Hope that helps a little.