2020-06-01T000000Z_763290331_RC290H9KNVWA_RTRMADP_3_BULGARIA-SERBIA (1)

Photo: Workers are seen through a pipe at a construction site on the extension of Russia’s TurkStream gas pipeline ahead of the visit of Serbia’s President Aleksandar Vucic and Bulgaria’s Prime Minister Boyko Borissov, in Letnitsa, Bulgaria, June 1, 2020. Credit: REUTERS/ Stoyan Nenov