A US military convoy drives on a highway from Kobane to Ain Issa on September 29, 2017. 
After a months-long campaign, the Syrian Democratic Forces -- a US-backed alliance of Arab and Kurdish fighters -- have cornered diehard jihadists in a pocket of territory in the battered northern city of Raqa. / AFP PHOTO / BULENT KILIC        (Photo credit should read BULENT KILIC/AFP/Getty Images)