U.S forces are still needed in Syria to prevent ISIS from reconstituting as a major threat following Assad's ouster, Defense Secretary Lloyd Austin said.
U.S. officials are also continuing their search for Austin Tice, an American journalist and Marine Corps vet who disappeared 12 years ago near Damascus.
The U.S. and its partners want to ensure the Islamic State can’t fill the leadership void following President Bashar Assad’s overthrow, officials said.