Recently, after getting tired of Bush's and Rice's public statements regarding uncertainty Osama was still alive, the White House received a secret, hand written letter from Osama himself. An unnamed spokesman confirmed this.
"Bush did get a personal letter from bin Laden. It arrived in an unmarked envelope and only contained a single line coded message: '370HSSV-0773H'."
Several agencies, including the NSA, FBI, CIA, and top military specialists spent considerable effort trying to decode the message without success. Eventually a low level intern at the Pentagon suggested they turn to the British MI-6, who have many more years of experience in the Middle-East.
Within only a few minutes, the MI-6 cabled the White House with the message, "Tell the President he's holding the message upside down"