TEHRAN, IRAN - NOVEMBER 23: Russian President Vladimir Putin (L) and Iran President Hassan Rouhani (R) hold a press conference after the end of the third Gas Exporting Countries Forum gas summit November 23, 2015 in Tehran, Iran. The summit is devoted to the assessment of the current situation on the world gas market as well as to the development prospects of the field. (Photo by Sasha Mordovets/Getty Images)
