Crude hits three-year high as global tensions rock oil markets

Workers connect drill bits and drill collars, used to extract natural petroleum, on Endeavor Energy Resources LP's Big Dog Drilling Rig 22 in the Permian basin outside of Midland, Texas, U.S., on Friday, Dec. 12, 2014.  Photographer: Brittany Sowacke/Bloomberg
Workers connect drill bits and drill collars, used to extract natural petroleum, on Endeavor Energy Resources LP's Big Dog Drilling Rig 22 in the Permian basin outside of Midland, Texas, U.S., on Friday, Dec. 12, 2014. Photographer: Brittany Sowacke/Bloomberg

Breaking