This one is stolen from Patrick who I believed stole from the Cook:
The Iranian Ambassador to the UN had just finished giving a speech, and walked out into the lobby where he met President Bush.
They shook hands, and as they walked the Iranian said, "You know, I have just one question about what I have seen in America."
President Bush said, "Well, anything I can do to help you, I will."
The Iranian whispered, "My son watches this show 'Star Trek' and in it there is Chekhov who is Russian, Scotty who is Scottish, and Sulu who is Chinese, but no Arabs. My son is very upset and doesn't understand why there aren't any Iranians on Star Trek.
President Bush laughed, leaned toward the Iranian ambassador, and whispered back, "It's because it takes place in the future."