Oil pumping units, also known as "nodding donkeys" or pumping jacks, stand on an oilfield operated by Tatneft OAO near residential housing in Almetyevsk, Russia, on Friday, July 31, 2015. Eleven months of surviving with oil below $100 have left Russia hardened enough to endure a monthlong drop to $40 a barrel, a survey of economists showed. Photographer: Andrey Rudakov/Bloomberg via Getty Images
