Tayssir Chikhaoui, left, and Eya Chikhaoui portray themselves in Four Daughters, which explores why their two older sisters left home to join ISIS. Photo: Tanit Films
Tayssir Chikhaoui, left, and Eya Chikhaoui portray themselves in Four Daughters, which explores why their two older sisters left home to join ISIS. Photo: Tanit Films

Kaouther Ben Hania reimagines documentary format with tragic tale of radicalisation