Barack Obama met with the Queen of England .
He asked her, "Your Majesty, how do you run such an efficient government? Are there any tips you can give to me?"
"Well," said the Queen, "the most important thing is to surround yourself with intelligent people."
Obama frowned, and then asked, "But how do I know the people around me are really intelligent?"
The Queen took a sip of tea. "Oh, that's easy; you just ask them to answer an intelligent riddle." The Queen pushed a button on her intercom. "Please send in the Prime Minister in here, would you?"
David Cameron walked into the room and said, “Yes, my Queen?"
The Queen smiled and said, "Answer me this please, Mr. Prime Minister, 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, David Cameron answered, "That would be me."
"Yes! Very good," said the Queen.
Obama went back home to ask Joe Biden, his vice presidential choice the same question. "Joe, 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," said Biden. "Let me get back to you on that one." He went to his advisors and asked every one, but none could give him an answer.
Finally, he ended up in the men's room and recognized Colin Powell's shoes in the next stall. Biden asked Powell, "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 yelled back, "That's easy, it's me!"
Biden smiled, and said, "Thanks!" Then, he went back to speak with Obama. "Say, I did some research and I have the answer to that riddle. It's Colin Powell!"
Obama got up, stomped over to Biden, and angrily yelled into his face, "No! you idiot! It's Tony Blair!"