Uncle Sam

Uncle Sam, a Canadian, and Osama bin Laden are walking down the beach when they find a genie's lamp. The Canadian rubs it and a genie pops out and gives them all a wish. The Canadian goes first. He says, "My ancestors were all farmers but I can't seem to grow anything, just give me 10 acres of fertile land." Bam, it's done. Osama says, "I want a wall around all of afghanastan so not one Muslim can get out and no one can get in, ever." And bam it's done. Then Uncle Sam says, "So how tall is this wall?" "Well it's 6000 feet high," says the genie. "And how thick is it?" The genie says, "Well it's 4000 feet wide nothing can get in or out." Uncle Sam finaly says his wish: "Fill it with water."