Three guys, a Nebraskan, a Texan and an Okie are out walking together one day. They come across a lantern and a Genie Pops out of it. "I will give you each one wish, that's three wishes total" says the Genie.
The Nebraskan 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 Nebraska." With a blink of the Genie's eye, 'FOOM' the land in Nebraska was forever made fertile for farming.
The Texan was amazed, so he said, "I want a wall around Texas, so that no foreigners can come into our precious state." Again, with a blink of the Genie's eye, 'POOF' there was a huge wall around Texas.
The Okie asks, "I'm very curious. Please tell me more about this wall." The Genie explains, "Well, it's about 150 feet high, 50 feet thick and completely surrounds the state. Nothing can get in or out."
The Okie says, "Fill it up with water."