Three guys, a Canadian, Osama Bin Ladin and Uncle Sam
are out walking together one day. They come across a
lantern and a Genie pops out of  it.
"I will give each of you each one wish, that's three
wishes total," says the Genie.

  The Canadian says, "I am a farmer, my dad was a
farmer, and my son  will also farm. I want the land to
be forever fertile in Canada."
With a blink of the Genie's eye, 'POOF' the land in
Canada was forever made fertile for farming.

 Osama Bin Ladin was amazed, so he said, "I want a
 wall around Afganistan, so that no infidels, Jews or
 Americans can come into our precious state."
 Again, with a blink of the Genie's eye, 'POOF'
 there was a huge wall round  Afganistan.

 "Uncle Sam" (A former civil engineer), asks,
 "I'm very curious. Please tell me more about thi s
 wall."
 ! The Genie explains, "Well, it's about 15,000 feet
 high, 500 feet thick and  completely surrounds the
 country; nothing can get in or out- virtually
 impenetrable.

 "UncleSam" says, "Fill it with water."