ISIS Prisons and Camps Are Festering in a Fragile Syria as Aid Peters Out

HASAKAH, Syria—In a wing of the notorious Al Sina prison in northeastern Syria, where some of the world’s most dangerous inmates are held, guards wearing balaclavas stood along a corridor lined with cells. A prisoner pressed his face to a small, square hole in one of the cell doors. Behind him, some 20 other prisoners in brown jumpsuits sat barefoot on the floor.

“Is Biden still the U.S. president?” he asked a visiting journalist. The prisoner, a British Islamic State member, didn’t get an answer.