Three guys, a Canadian, Osama Bin Laden, and Uncle Sam are out walking one day. They come across a lantern and a genie pops out of it. “I'll give each of you one wish, that's 3 wishes total” says the genie. The Canadian says, “I'm a farmer, my dad was a farmer and my son also will farm. I want the land to be forever fertile in Canada”. With a blink of the genies eye, poof, the land in Canada was forever made fertile for farming. Osama Bin Laden was amazed, so he said, “I want a wall around Afghanistan so no infidels, Jews or Americans can come into our precious state.” Again with a blink of the genies eye, poof, there was a huge wall around Afghanistan. Uncle Sam (a former civil engineer) asks, “I'm very curious, please tell me more about this 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 it.” Uncle Sam says, “Fill it with water”.