PBS News Weekend

For years beginning in 2014, the Iraqi military with support from the United States fought and appeared to eventually win a grueling war against the Islamic State. And while the battle over large sections of Iraq have mostly wound down, members of the terrorist group have risen again at the nexus of four of the country's provinces: Kirkuk, Salahuddin, Diyala and Sulaimania. Iraqi troops there are now participating in a new kind of fight, as they search out pockets of ISIS fighters who escaped the battlefields and have returned to their insurgent roots. NewsHour Weekend Special Correspondent Simona Foltyn traveled with Iraqi security forces as they attempted to clear remote, mountainous areas where ISIS militants have regrouped.