The Iranian Ambassador to the UN had just finished giving a speech and walked
out into the lobby of the convention center where he met U.S. General Patraeus.
They shook hands.
As they walked the Iranian said, "You know, I
have just one question about what I have seen in America ."
The General said, "Well, anything I can do to help you, I will."
The Iranian whispered, "My son watches this show called Star Trek and in it there is Chekhov who is Russian, Scotty who is Scottish, Uhura who is black and Sulu who is Japanese, but no Muslims.
My son is very upset and doesn't understand why there aren't any Iranians, Iraqis, Afghans, Syrians or Pakistanis on Star Trek."
The General laughed, leaned toward the Iranian ambassador, and whispered back,
"That's because it takes place in the future".

I heard one similar as to why there were no Puerto Ricans...Because they don't work in the future either.