MOSCOW, RUSSIA - OCTOBER 21: Russian President Vladimir Putin (R) and Syrian President Bashar al-Assad (L) hold a meeting at the Kremlin Palace in Moscow, Russia, on October 21, 2015. (Photo by Pool/Kremlin Press Office/Anadolu Agency/Getty Images)
MOSCOW, RUSSIA - OCTOBER 21: Russian President Vladimir Putin (R) and Syrian President Bashar al-Assad (L) hold a meeting at the Kremlin Palace in Moscow, Russia, on October 21, 2015. (Photo by Pool/Kremlin Press Office/Anadolu Agency/Getty Images)