After numerous rounds of "we don't know if Osama is still alive", Osama himself decided to send George Bush a letter in his own handwriting to let him know he was still in the game. Bush opened the letter and it appeared to contain a single line coded message: 370HSSV 0773H
Bush was baffled, so he e-mailed it to Condi Rice. Condi and her aides had no clue either, so they sent it to the FBI. No one could solve it at FBI, CIA or NASA. They eventually asked Britain's MI6 for help. Within minutes, MI6 cabled this reply: "Tell the President he is holding the message upside down."