+ infoA woman who was evacuated out of the last territory held by Islamic State militants holds her baby after being screened by U.S.-backed Syrian Democratic Forces (SDF) in the desert outside Baghouz, Syria, Monday, Feb. 25, 2019. (AP Photo/Felipe Dana)
+ infoA U.S.-backed Syrian Democratic Forces (SDF) fighter enters a building as fight against Islamic State militants continues in the village of Baghouz, Syria, Saturday, Feb. 16, 2019. (AP Photo/Felipe Dana)
Women and children exit the back of a truck as they arrive to a U.S.-backed Syrian Democratic Forces (SDF) screening area after being evacuated out of the last territory held by Islamic State militants, in the desert outside Baghouz, Syria, Friday, March 1, 2019. (AP Photo/Felipe Dana)
Men, some accused of being ISIS supporters, walk to be screened after being evacuated out of the last territory held by Islamic State militants, near Baghouz, eastern Syria, Friday, Feb. 22, 2019. (AP Photo/Felipe Dana)
U.S.-backed Syrian Democratic Forces (SDF) fighters look as an airstrike hit territory still held by Islamic State militants in the desert outside Baghouz, Syria, Tuesday, Feb. 19, 2019. (AP Photo/Felipe Dana)
Women and children ride in the back of a truck part of a convoy evacuating hundreds out of the last territory held by Islamic State militants in Baghouz, eastern Syria, Wednesday, Feb. 20, 2019. The evacuation signals the end of a week long standoff and opens the way to U.S.-backed Syrian Democratic Forces (SDF) recapture the territory. (AP Photo/Felipe Dana)
U.S.-backed Syrian Democratic Forces (SDF) fighters walk in a building as fight against Islamic State militants continue in the village of Baghouz, Syria, Saturday, Feb. 16, 2019. (AP Photo/Felipe Dana)
Two injured boys suspected of being Islamic State supporters lay on the back of a truck at a U.S.-backed Syrian Democratic Forces (SDF) screening area after being evacuated out of the last territory held by Islamic State militants, in the desert outside Baghouz, Syria, Friday, March 1, 2019. (AP Photo/Felipe Dana)
A U.S.-backed Syrian Democratic Forces (SDF) fighter stands at a check point near Omar oil field base, eastern Syria, Sunday, Feb. 24, 2019. (AP Photo/Felipe Dana)
A boy holds her mothers hand as they wait to be screened after being evacuated out of the last territory held by Islamic State militants, near Baghouz, eastern Syria, Friday, Feb. 22, 2019. (AP Photo/Felipe Dana)
Destroyed homes are framed by damaged windows in a building taken by U.S.-backed Syrian Democratic Forces (SDF) near the last speck of land still held by Islamic State militants in Baghouz, Syria, Monday, Feb. 18, 2019. (AP Photo/Felipe Dana)
Women and children exit the back of a truck part of a convoy evacuating hundreds out of the last territory held by Islamic State militants in Baghouz, eastern Syria, Friday, Feb. 22, 2019. (AP Photo/Felipe Dana)
A U.S.-backed Syrian Democratic Forces (SDF) fighter gestures as men walk to be screened after being evacuated out of the last territory held by Islamic State militants, near Baghouz, eastern Syria, Friday, Feb. 22, 2019. (AP Photo/Felipe Dana)
Women and children wait to be screened after being evacuated out of the last territory held by Islamic State militants, near Baghouz, eastern Syria, Friday, Feb. 22, 2019. (AP Photo/Felipe Dana)
Men, some accused of being ISIS supporters, wait to be screened by U.S.-backed Syrian Democratic Forces (SDF) fighters after being evacuated out of the last territory held by Islamic State militants, near Baghouz, eastern Syria, Friday, Feb. 22, 2019. (AP Photo/Felipe Dana)