After numerous rounds of "We don't even know if Osama is still alive", Osama himself decided to send George Bush and John Kerry each the same letter in his own handwriting to let him know he was still in the game.
They opened the letter and it appeared to contain a coded message:
Kerry was baffled, so he typed it out and emailed it to John Edwards. Edwards and his advisors had no clue either, so they sent it to the Democratic National Committee.
Bush was baffled, so he typed it out and emailed it to Dick Cheney. Cheney and his advisors had no clue either, so they sent it to the Republican National Committee.
No one could solve it, so it went to the National Education Association and then to MIT. Kerry sent it to Michael Dukakis who then sent it to Teddy Kennedy. Bush sent his to the CIA & DIA, which couldn't figure it out either.
Eventually they both asked Britain's MI6 for help. MI6 cabled back:
"Tell the President and the Presidential Hopeful that they are looking at the message upside down."