urkey's President Recep Tayyip Erdogan, second left, is briefed by a Turkish Army officer at the command center at the command center in Hatay province, Turkey at the border with Syria, Thursday, Jan. 25, 2018. Erdogan has traveled to Turkey's border with Syria where he is being briefed on Turkey's military offensive against the Syrian Kurdish-held enclave of Afrin. (Pool Photo via AP)
Turkey-backed Free Syrian Army fighters secure an area where Turkish army's Operation Olive Branch continue in Azaz, northwestern Syria, Wednesday, Jan. 24, 2018. Turkish President Recep Tayyip Erdogan says Turkey's incursion into a Kurdish-held enclave in Syria is progressing "successfully" and will continue until the last "terrorist" is eliminated. (DHA-Depo Photos via AP)
FILE - In this Tuesday, Jan. 23, 2018 file photo, Turkey's President Recep Tayyip Erdogan speaks during the funeral prayers for Sergeant Musa Ozalkan, the first Turkish soldier to be killed in Turkey's cross-border operation on Afrin, a Kurdish held enclave in northern Syria, in Ankara, Turkey. Turkish officials have been threatening to launch the offensive and preparing for it for months. But there have been shades of gray in Ankara’s professed goals about the military incursion, which was launched on Saturday. (Kayhan Ozer/Pool Photo via AP, FILE)