Foreign Minister of Russia Sergey Lavrov shakes hands with US Secretary of State John Kerry as he leaves a UN Security Council meeting on Syria at the United Nations in New York on December 18, 2015. The UN Security Council on Friday unanimously adopted a resolution endorsing a peace process to end the nearly five-year war in Syria.  AFP PHOTO/ TIMOTHY A. CLARY / AFP / TIMOTHY A. CLARY        (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)