Fighters from the Syrian Democratic Forces and other U.S.-backed troops have been preparing to take control of Raqqa for months. AP hide caption
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U.S.-backed Syrian Democratic Forces, made up of an alliance of Arab and Kurdish fighters, regroup on the northern outskirts of Deir Ezzor as they advance to encircle the ISIS bastion of Raqqa on Feb. 21. Delil Souleiman/AFP/Getty Images hide caption
Big Changes And Major Dilemmas Loom In Next Phase Of ISIS War In Syria
U.S.-backed fighters rest during fighting with the Islamic State group near Ein Issa, north of Raqqa, Syria, as shown in a video by Qasioun, a Syrian opposition media outlet. AP hide caption