The Queen's Intelligence riddle:

George W. Bush meets with the Queen of England. He asks her, "Your
Majesty, how do you run such an efficient government? Are there any tips you can give to me?" "Well," says the Queen, "the most important thing is to surround yourself with intelligent people."

Bush frowns. "But how do I know the people around me are really
intelligent?" The Queen takes a sip of tea. "Oh, that's easy. You just ask
them to answer an intelligence riddle." The Queen pushes a button on her
intercom. "Please send Tony Blair in here, would you?"
Tony Blair walks into the room. "Yes, Your Majesty?"
The Queen smiles. "Answer me this, please, Tony. Your mother
and father have a child. It is not your brother and it is not your sister.
Who is it?"

Without pausing for a moment, Tony Blair answers, "That would be me."
"Yes! Very good," says the Queen.
Back at the White House, Bush asks to speak with vice president Dick
Cheney. "Dick, answer this for me. Your mother and your father have a
child. It's not your brother and it's not your sister. Who is it?"
"I'm not sure," says the vice president. "Let me get back to you on
that one."
Dick Cheney goes to his advisors and asks every one, but none can give
him an answer. Finally, he ends up in the men's room and recognizes Colin
Powell's shoes in the next stall.
Dick shouts, "Colin! Can you answer this for me? Your mother and father
have a child and it's not your brother or your sister. Who is it?"
Colin Powell yells back, "That's easy. It's me!"
Dick Cheney smiles. "Thanks!"
Cheney goes back to the Oval Office to speak with Bush. "Say, I did some research and I have the answer to that riddle. It's Colin Powell."
Bush gets up, stomps over to Dick Cheney, and angrily yells into his face,
"No, you idiot! It's Tony Blair!"