U.S. President Barack Obama, left, speaks with Russian President Vladimir Putin, right, prior to the opening session of the G-20 summit in Antalya, Turkey, Sunday, Nov. 15 2015. The 2015 G-20 Leaders Summit is held near the Turkish Mediterranean coastal city of Antalya on Nov. 15-16, 2015. (RIA-Novosti, Kremlin Pool Photo via AP)