Turkish President Recep Tayyip Erdogan (R) and Russian President Vladimir Putin give a joint press conference at the Presidential Complex in Ankara on December 11, 2017.
Russian President Vladimir Putin arrived in Ankara on December 11 for the last leg of a frantic day-long diplomatic dash during which he made his first visit to Syria and ordered the partial withdrawal of Russia's troops from the war-torn country. / AFP PHOTO / Sputnik / Alexei Druzhinin        (Photo credit should read ALEXEI DRUZHININ/AFP/Getty Images)