Ben Shaw hangs from an oil derrick outside Williston, ND, in July 2011. Williston's mayor, Ward Koeser, estimates that the town has between 2,000 and 3,000 job openings for oil workers.
U.S. Air Force F-16 jet fighters sit on the tarmac at Aviano Air Base in Italy in March. The Air Force tested its jets on fuel made of 50 percent vegetable oil.
Giuseppe Cacace/AFP/Getty Images