After several rounds of:
"We don't even 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 coded message:

370HSSV-0773H

Bush was baffled, so he e-mailed it to Colin Powell. Colin and his aides had no clue either so they sent it to the FBI.

No one could solve it so it went to the CIA, then to the NSA, then to the Secret Service.

With no clue as to its meaning, they eventually asked Britain's MI-6 for help.

The response from MI-6 to the White House was:
"Tell the President he is holding the letter upside down!"