It has been two years since Libyan and U.S. forces pushed Islamic State fighters from the country's coast, where the militant group held a short-lived caliphate just a few hundred miles from Europe. But Libya remains in turmoil amid a civil war, and since its ouster from Libyan cities, ISIS has regrouped in the surrounding desert, launching a series of deadly attacks last year. And with fears of a resurgent ISIS, Libyan security forces say members of the group continue to work closely with migrant traffickers in the coastal city of Sabratha, ferrying people from sub-Saharan Africa to Europe. NewsHour Weekend Special Correspondent Christopher Livesay reports. This story was made possible with special funding from the Pulitzer Center on Crisis Reporting.