Unemployment is a national problem in the U.S., but you wouldn't know that if you travel through North Dakota.
The state's unemployment rate hovers around 3 percent, and "Help Wanted" signs litter the landscape of cities such as Williston in the same way "For Sale" signs populate the streets of Las Vegas.
"It's a zoo," said Terry Ayers, who drove into town from Spokane, Wash., slept in his truck, and found a job within hours of arrival, tripling his salary. "It's crazy what's going on out here."
Billions of dollars are coming into the state and thousands of people are following—all because millions of barrels of oil are flowing out.