From left to right, Boyko Borissov, Bulgaria's prime minister, Vladimir Putin, Russia's president, Recep Tayyip Erdogan, Turkey's president, and Aleksandar Vucic, Serbia's president, open a symbolic valve for the TurkStream natural gas pipeline, operated by Gazprom PJSC and Botas, during the pipeline's inauguration in Istanbul, Turkey, Wednesday, Jan. 8, 2020. TurkStream is set to carry Russian gas under the Black Sea to Turkey and supply several countries in southeast Europe once fully operational, just as U.S. sanctions stall another Gazprom PJSC export line. Photographer: Kerem Uzel/Bloomberg via Getty Images
