Syria US

American troops look out toward the border with Turkey on Feb. 7, 2018, from a small outpost near the town of Manbij, northern Syria. The United States’ main ally in Syria on Dec. 20, 2018, rejected President Donald Trump’s claim that Islamic State militants have been defeated and warned that the withdrawal of American troops would lead to a resurgence of the extremist group. (AP Photo/Susannah George, File)