This January 28, 2018 file photo, Turkish troops and pro-Turkey Syrian fighters try to take control of Bursayah hill, which separates the Kurdish-held enclave of Afrin from the Turkey-controlled town of Azaz, Syria. The planned US troop withdrawal opens a void in the north and east of Syria, and the conflicts and rivalries among all the powers in the Middle East are converging to fill it. Photo: AP Photo, File