Crude prices have plunged by 25 percent since June, making it painful or uneconomic for producers in Russia, Venezuela and Iran, for the pioneering shale oil drillers in America's heartland and for Canada's oil sands extractors. (Andrew Harnik/The Washington Times)
E. J. Viso, of Venezuela, prepares to drive during practice for the Indianapolis 500 IndyCar auto race at the Indianapolis Motor Speedway in Indianapolis, Thursday, May 15, 2014. (AP Photo/Michael Conroy)
E. J. Viso, of Venezuela, jumps over the pit wall during practice for Indianapolis 500 IndyCar auto race at the Indianapolis Motor Speedway in Indianapolis, Thursday, May 15, 2014. (AP Photo/Darron Cummings)